For an all-around greenhouse setup, I’d start with the MIXC 5-Pack Seed Starter Tray Kit, 200 Cells, which balances high capacity with a manageable five-tray format. The Bonviee 5-Pack with 12-LED Grow Lights is a standout when seedlings need supplemental light, while the 10-Pack with Humidity Domes and Base Trays suits growers who want a ready-to-cover setup. The main tradeoffs are cell count versus room to grow, reusable sturdiness versus low-cost volume, and built-in humidity or lighting versus simpler trays that require separate gear. I compare all 15 options by fit, setup, and growing needs below so you can choose greenhouse seed starting trays that match your space and routine.
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Key Takeaways
- The MIXC 5-Pack, 200 Cells earns the overall lead by pairing substantial sowing capacity with fewer separate trays to organize than many high-cell-count packs.
- LED-equipped Bonviee kits stand apart for growers whose greenhouse bench or early-season light conditions call for supplemental illumination; they add equipment and setup that basic trays do not.
- Dome-and-base bundles make humidity management easier to start, but growers should compare venting and watering access rather than assume every covered kit behaves the same.
- High cell counts are not automatically better: the Mr. Pen 400-cell kit favors batch sowing, while the Burpee 36-cell reusable tray suits smaller runs and easier crop separation.
- The Living Whole Foods trays have no drain holes, making them useful as catch trays or for controlled bottom watering, but a poor default choice for seedlings that need drainage in each growing container.
| greenhouse seed starting tray | Brand | Dimensions | Cells per tray | Included components |
|---|---|---|---|---|
| Gardzen 30-Pack 6-Cell Seed St | Gardzen | — | 6 | — |
| Bonviee Seed Starter Trays wit | Bonviee | 5.5 x 7.25 x 4.4 inches | — | 5 cell trays, 5 elevated domes, 5 grow lights, 1 USB cable, 10 labels |
| Seed Starter Trays | The Hydroponic City | — | 6 | — |
| MIXC 5-Pack Seed Starter Tray | MIXC | — | — | 5 seed trays, 5 bottom trays, 5 humidity domes, 2 garden tools, 10 plant labels |
| 10-Pack Seed Starter Trays wit | — | 7.1 x 5.5 x 4.5 inches | 12 | 10 seed trays, 10 humidity domes, 10 base trays, 20 plant labels, 2 gardening tools |
| Bonviee 5-Pack Seed Starter Tr | Bonviee | 5.5 x 7.25 x 4.63 inches | 12 | — |
| Gardzen Seed Starter Tray Kits | Gardzen | 9 x 14.5 x 1.85 inches | 40 | — |
| Bonviee 5-Pack Seed Starter Tr | Bonviee | — | 12 | — |
| Burpee SuperSeed 36-Cell Reusa | — | 11.5 x 10-3/8 x 2-1/4 inches | — | — |
| Living Whole Foods Black Plast | Living Whole Foods | — | — | — |
| Mr. Pen Seed Starter Tray Kit | Mr. Pen | 14.5 x 9 x 4.3 inches | 40 | 10 base trays, 10 seed trays, 10 transparent vented domes, dibber, and widger |
| Bonviee Seed Starter Trays wit | Bonviee | 5.7 x 8.5 x 5.5 inches | — | 5 trays, 5 domes, 5 lights, 1-to-5 USB cable, and 10 labels |
| Bonviee 5-Pack Seed Starter Tr | Bonviee | 4.4 x 4.4 x 6.1 inches | 12 | 5 clear trays, 5 black base trays, 5 clear lids, 5 adjustable vents, and 10 plant labels |
| MIXC 10-Pack Seed Starter Tray | MIXC | 7.28 x 5.67 x 6.5 inches | — | 10 trays, 10 watertight base trays, 10 humidity domes, and 10 plant labels |
| MIXC 5-Pack Seed Starter Tray | MIXC | — | — | 5 seed trays, 5 bottom trays, 5 humidity domes, 2 garden tools, and 10 plant labels |
More Details on Our Top Picks
Gardzen 30-Pack 6-Cell Seed Starting Trays, Black
For greenhouse growers who sow a few varieties at a time, I’d favor these 30 separate six-cell trays over a single high-capacity flat. The small units are easier to group by crop or sowing date, and drainage holes with top water-guide channels help manage moisture across each tray. They’re reusable plastic, so they suit a routine of washing and reusing trays between rounds. Compared with the MIXC 5-Pack Seed Starter Tray Kit, 200 Cells, Gardzen gives you far fewer cells per unit and no humidity domes or base trays; that makes it less of an all-in-one greenhouse setup, but more flexible for small batches. The tradeoff is cell size: at 1.5 inches square, these are better for starting seedlings than keeping them in the tray for long. They’re listed for indoor use, so greenhouse buyers should check whether that fits their setup.
Pros:- Thirty separate trays make it easy to divide seedlings by variety or sowing date
- Drainage holes and top guide channels support more controlled watering
- Reusable plastic construction can serve multiple seed-starting rounds
- Six cells per tray suit small, organized batches
Cons:- The 1.5-inch-square cells give seedlings limited room before transplanting
- No humidity domes or base trays are included
- Listed for indoor use, which may not suit every greenhouse setup
Best for: Greenhouse growers who start several flower, herb, or vegetable varieties in small batches and want separate trays they can label and move individually.
Not ideal for: Growers who want covered humidity control, integrated base trays, or room for seedlings to grow on in larger cells.
- Brand:Gardzen
- Pack quantity:30 trays
- Cells per tray:6
- Tray dimensions:5.4 x 3.7 x 2.2 inches
- Cell dimensions:1.5 x 1.5 x 2.2 inches
- Material and color:Plastic, black
- Moisture features:Drainage holes and top water-guide channels
- Listed use:Indoor
Our verdict“Choose the Gardzen set if you want many small, reusable trays for staggered sowings rather than a covered, high-capacity kit.”
Bonviee Seed Starter Trays with 12-LED Grow Lights, Green, 5-Pack
I’d put this Bonviee kit near the top for greenhouse growers who also start seeds indoors, especially when natural light is limited. Its five 12-cell trays provide 60 planting spots, while each tray has a 12-LED grow light and vented humidity dome. Clear cells also make it easier to check moisture and root growth without disturbing seedlings. Compared with the MIXC 5-Pack Seed Starter Tray Kit, 200 Cells, Bonviee has far fewer cells, but adds lighting instead of prioritizing bulk capacity and stackable bottom trays. That makes it a more specialized choice for a smaller, closely monitored batch. The main catch is power: the included USB cable has a one-to-five connection, but the power adapter is not included. Its indoor-use design also makes it a weaker match for growers seeking a simple outdoor greenhouse tray set.
Pros:- Five trays provide 60 planting cells in one coordinated kit
- Each tray includes a 12-LED grow light and vented humidity dome
- Clear cells help monitor moisture and root development
- Drainage holes support bottom watering
Cons:- USB power adapter is not included
- Sixty cells offer less capacity than the MIXC 200-cell kit
- Designed for indoor use rather than general indoor and outdoor growing
Best for: Indoor seed starters with limited natural light who want covered trays, visible cells, and included lighting for a modest number of seedlings.
Not ideal for: Greenhouse growers who need a large cell count, want an outdoor-oriented kit, or do not have a compatible USB power adapter.
- Brand:Bonviee
- Pack size:5 trays
- Cell count:60 total; 12 per tray
- Grow lights:12 LEDs per tray
- Power:USB; one-to-five cable included; power adapter not included
- Materials:PET and PP
- Dimensions:5.5 x 7.25 x 4.4 inches
- Included components:5 cell trays, 5 elevated domes, 5 grow lights, 1 USB cable, 10 labels
- Listed use:Indoor
Our verdict“Choose Bonviee if built-in lighting matters more than maximum capacity and you can supply the USB power adapter.”
Seed Starter Trays, 144 Cells (24 Trays with 6 Cells Each) and Plant Stakes
This set makes sense for greenhouse growers who want 144 seedlings split across 24 small trays, rather than packed into a few large flats. The six-cell format lets me separate varieties or sowing dates, and the drainage slits help excess water escape from the 2.25-inch-deep cells. Five plant stakes are included, a modest but useful addition when several crops are underway. Compared with the Gardzen 30-Pack 6-Cell Seed Starting Trays, this set has fewer trays but slightly deeper cells; it also specifies outdoor use, which may suit greenhouse workflows better. Neither option includes humidity domes or base trays, so growers who need covered propagation will need a separate solution. The cell width remains just 1.5 inches, making these best for starting seedlings, not holding them for an extended period.
Pros:- Twenty-four trays divide 144 cells into manageable small batches
- Drainage slits help release excess moisture
- Cells are 2.25 inches deep
- Five plant stakes are included for labeling
Cons:- Six cells per tray may be inefficient for growers who prefer larger flats
- No domes or base trays are included
- The 1.5-inch-square cells limit how long seedlings can stay in the trays
Best for: Greenhouse growers starting multiple labeled flower, herb, vegetable, or succulent varieties who prefer small, separable batches.
Not ideal for: Growers who want humidity domes, integrated water-catching bases, or fewer, larger cells for longer seedling growth.
- Brand:The Hydroponic City
- Tray count:24
- Cells per tray:6
- Total cells:144
- Cell dimensions:1.5 x 1.5 x 2.25 inches
- Tray dimensions:5.2 x 3.5 x 2.2 inches
- Material and color:Plastic, black
- Included accessories:5 plant stakes
- Listed use:Outdoor
Our verdict“Pick this set for many separately managed, labeled seed batches, provided you already have a plan for humidity and runoff.”
MIXC 5-Pack Seed Starter Tray Kit, 200 Cells
When the goal is to start a large greenhouse batch in a compact set of flats, I’d choose this MIXC kit for its 200 total cells across five trays. Its clear humidity domes have adjustable vents, so growers can tune airflow as seedlings develop instead of relying on a sealed cover. Stackable bottom trays help keep the set organized, and the kit includes garden tools and plant labels. Compared with the 10-Pack Seed Starter Trays with Humidity Domes and Base Trays, 120 Cells, MIXC packs more cells into fewer trays, which can simplify handling but offers less separation between crop groups. The 1.5-inch-square cells are the key compromise: they work for small seeds and early growth, but are not roomy. I’d skip this for larger seedlings or anyone who wants each variety in its own smaller tray.
Pros:- Five trays provide 200 cells for high-volume sowing
- Adjustable dome vents help regulate airflow and humidity
- Stackable bottom trays support tidy storage and handling
- Garden tools and plant labels are included
Cons:- Small 1.5-inch-square cells suit small seeds better than larger seedlings
- Five trays provide less batch separation than a 10-tray kit
- Dense cell capacity can make individual crop groups less convenient to manage
Best for: High-volume greenhouse seed starters who want adjustable humidity control and a large number of small cells in five trays.
Not ideal for: Growers who need larger cells, more individual trays for separating varieties, or a lower-density setup for longer seedling growth.
- Brand:MIXC
- Tray count:5
- Total cell count:200
- Cell dimensions:1.5 x 1.5 x 2 inches
- Humidity dome height:2.75 inches
- Product dimensions:14.57 x 9.02 x 5 inches
- Material and color:Plastic, black
- Included components:5 seed trays, 5 bottom trays, 5 humidity domes, 2 garden tools, 10 plant labels
- Listed use:Indoor and outdoor
Our verdict“Choose MIXC when cell count and adjustable humidity matter more than roomy cells or numerous separate trays.”
10-Pack Seed Starter Trays with Humidity Domes and Base Trays, 120 Cells
I’d choose this 10-pack when keeping crop groups distinct is more useful than squeezing in the highest possible cell count. It includes ten individual 12-cell trays, each paired with a clear humidity dome and base tray, so different varieties can be organized and moved separately. Adjustable vents let growers change airflow as seedlings emerge, while drainage holes and bases help manage watering and runoff. Compared with the MIXC 5-Pack Seed Starter Tray Kit, 200 Cells, this set has 80 fewer cells but twice as many separate trays; that favors flexible batch management over maximum output. Its listed indoor and outdoor use fits greenhouse setups, though the plastic construction may not hold up as well as sturdier tray materials. With only 12 cells per tray, it also suits organized small-to-medium sowings better than a single large planting run.
Pros:- Ten separate trays make it easier to organize varieties and sowing dates
- Each tray includes a clear humidity dome and base tray
- Adjustable vents provide control over airflow
- Drainage holes and bases help manage water
Cons:- The 120-cell total is lower than the MIXC 200-cell kit
- Twelve cells per tray may not suit large single-variety sowings
- Plastic construction may be less durable than sturdier materials
Best for: Greenhouse gardeners who sow several varieties or batches and want each group in its own covered tray with a matching base.
Not ideal for: High-volume growers who want the greatest cell count per kit, or buyers seeking especially heavy-duty tray construction.
- Tray count:10
- Cells per tray:12
- Total cells:120
- Dimensions:7.1 x 5.5 x 4.5 inches
- Material and color:Plastic, green
- Included components:10 seed trays, 10 humidity domes, 10 base trays, 20 plant labels, 2 gardening tools
- Weight:16 ounces
- Usage:Indoor and outdoor
Our verdict“Pick this kit if separate covered trays and flexible batch organization matter more than maximum cell capacity.”
Bonviee 5-Pack Seed Starter Trays with Humidity Domes and Bases, 12 Cells Each
For greenhouse growers starting fewer plants per batch, this Bonviee kit gives each seedling more room than the Gardzen 5-Pack, 200 Cells. Its 12 cells per tray are 1.5 inches square, a useful fit for larger seeds or seedlings that need more space before transplanting. Five domes with adjustable vents let you manage humidity across separate trays, while the clear plastic makes it easier to check growth without lifting lids. Watertight bases also help contain runoff on a greenhouse bench, and the trays can be used on heat mats. The tradeoff is capacity: 60 total cells is a fraction of Gardzen’s 200, so this set is a poor match for high-volume starts. Its plastic construction also may not hold up as well as more rigid reusable options.
Pros:- Roomy 1.5-inch square cells suit larger seeds and developing seedlings
- Adjustable dome vents allow humidity and airflow changes
- Watertight bases help catch runoff on greenhouse benches
- Clear trays make roots and seedling progress easier to monitor
Cons:- Only 60 cells across the full set, limiting batch capacity
- Plastic construction may be less durable than rigid reusable trays
Best for: Greenhouse growers starting a modest number of larger-seeded vegetables or flowers who want separate humidity-controlled trays.
Not ideal for: Growers starting many small seeds at once or seeking heavy-duty trays for repeated, rough handling.
- Brand:Bonviee
- Set contents:5 trays, 5 watertight bases, 5 humidity domes, 10 plant labels
- Cells per tray:12
- Total cells:60
- Cell dimensions:1.5-inch square
- Material:Plastic
- Dimensions:5.5 x 7.25 x 4.63 inches
- Usage:Indoor
Our verdict“Choose this Bonviee set for a small greenhouse batch of larger seeds; pick the Gardzen 200-cell kit when capacity matters more.”
Gardzen Seed Starter Tray Kits, 5-Pack, 200 Cells
When greenhouse plans call for many starts at once, Gardzen’s 200-cell capacity puts it ahead of the 60-cell Bonviee kit. Five 40-cell trays let growers divide varieties into manageable groups, and the clear humidity domes make it possible to monitor seedlings without repeatedly disturbing the covers. Adjustable vents give some control over airflow, while drainage holes help excess water leave each cell rather than linger around roots. That setup suits both seed starting and cuttings. The compromise is the plastic build: the product data notes it may be less durable than rigid reusable alternatives, a concern for growers who handle trays frequently or want long service life. Its larger capacity also calls for more bench space and more attention to labeling than a small-cell-count kit.
Pros:- 200 cells provide substantial capacity across five trays
- Adjustable vents support airflow management under the domes
- Cell drainage holes help reduce overwatering
- Clear domes make seedling checks easier
Cons:- Plastic trays may be less durable than rigid reusable alternatives
- Large batch capacity requires more greenhouse bench space
- Many cells can make variety labeling and watering more involved
Best for: Greenhouse gardeners raising large batches of vegetables, flowers, or cuttings who can dedicate bench space to multiple trays.
Not ideal for: Small-space growers or buyers prioritizing especially rigid trays for repeated, heavy handling.
- Brand:Gardzen
- Set size:5 trays
- Cells per tray:40
- Total cells:200
- Material:Plastic
- Dimensions:9 x 14.5 x 1.85 inches
- Weight:2.6 pounds
- Features:Adjustable vents, drainage holes, clear humidity domes
Our verdict“Choose Gardzen when a greenhouse sowing plan needs 200 cells and you accept lighter-duty plastic in exchange for capacity.”
Bonviee 5-Pack Seed Starter Trays with Humidity Domes and Bases, 12 Cells per Tray, Clear
This clear Bonviee kit is a good fit for greenhouse growers who want to watch both seedlings and root development without lifting trays or guessing at moisture. Each of its 12-cell trays has drainage holes, and the adjustable-vent domes give growers a way to change airflow as plants develop. Bases, domes, and plant labels are included, so the set is ready for organized small-batch sowing. Compared with the green Bonviee 12-cell kit, this version emphasizes clear trays and root visibility; both offer five trays and a modest 60-cell total, so neither is built for high-volume production like the Gardzen 200-cell set. The stated indoor use and plastic construction are limiting factors for buyers seeking a sturdier, all-weather greenhouse system, and the listed dimensions provide only a 4.3-inch depth measurement.
Pros:- Clear trays make root development visible
- Adjustable dome vents help manage humidity and airflow
- Drainage holes support moisture control in each cell
- Kit includes bases, domes, and plant labels
Cons:- 60-cell total is modest beside the Gardzen 200-cell kit
- Plastic may be less durable than rigid alternatives
- Designed for indoor use, with only depth specified in the item dimensions
Best for: Indoor greenhouse and windowsill growers who want to observe root growth and keep small seed batches separated.
Not ideal for: High-volume growers or buyers who need clearly specified full tray dimensions and heavy-duty construction.
- Brand:Bonviee
- Quantity:5 trays, 5 bases, 5 humidity domes, 10 plant labels
- Cells per tray:12
- Material:Plastic
- Color:Clear
- Shape:Rectangular
- Drainage holes:Yes
- Item dimension provided:4.3 inches deep
Our verdict“Pick this Bonviee kit for clear, well-equipped small-batch starts, but choose Gardzen if you need substantially more cells.”
Burpee SuperSeed 36-Cell Reusable Seed Starting Tray
The Burpee SuperSeed is the specialist pick for growers who want to move seedlings from tray to greenhouse beds with less root disturbance. Its flexible silicone cells pop out, unlike the fixed plastic cells in the Bonviee and Gardzen kits, making removal gentler when seedlings are ready to transplant. A 36-cell layout offers a middle ground between Bonviee’s 12-cell trays and Gardzen’s 40-cell trays, while drainage slots and water channels support moisture movement. Side handles and labeled rows add useful organization, and the tray is top-rack dishwasher safe for cleanup between sowings. The main tradeoff is that it is a single tray rather than a multi-tray kit with humidity domes and bases. Seeds, growing mix, and lighting are not included, so greenhouse growers must supply those separately.
Pros:- Flexible silicone cells pop out to ease transplanting
- Drainage slots and water channels support water movement and aeration
- Top-rack dishwasher-safe design simplifies cleanup
- Labeled rows and side handles aid organization and handling
Cons:- One tray offers less overall capacity than multi-tray kits such as Gardzen
- Humidity domes, seeds, growing mix, and lighting are not included
Best for: Growers who prioritize easy, gentle transplanting and want a reusable tray for herbs, flowers, or vegetables.
Not ideal for: Buyers seeking multiple trays, humidity domes, or a complete greenhouse propagation setup in one kit.
- Cell count:36
- Material:Food-grade silicone
- Dimensions:11.5 x 10-3/8 x 2-1/4 inches
- Color:Blue
- Suitable plants:Herbs, flowers, and vegetables
- Features:Flexible pop-out cells, drainage slots, water channels, side handles, labeled rows
- Care:Top-rack dishwasher safe
- Use:Indoor seed starting
Our verdict“Choose Burpee for reusable cells that make transplanting easier, rather than for maximum greenhouse starting capacity or a complete kit.”
Living Whole Foods Black Plastic Plant Growing Trays, No Drain Holes, 20 × 10 in, Set of 10
These Living Whole Foods trays are a different kind of greenhouse starting tool: they are open growing trays, not cell trays. With no drain holes, they suit microgreens, wheatgrass, hydroponic setups, or use as catch trays beneath other containers. The 20-by-10-inch grow-pad fit provides a broad, flat area, while the stated 2.375-inch depth holds a useful volume of water or growing medium. Compared with the Burpee SuperSeed, these trays do not separate seedlings into individual cells or help with transplanting; compared with Bonviee’s domed kits, they provide no humidity cover. Their sturdy reusable plastic is an advantage for repeated tray-based growing, but the lack of drainage means growers must manage watering carefully to avoid standing water. Tapered sides also make the base smaller than the top.
Pros:- Ten reusable trays suit repeated microgreen or wheatgrass batches
- No-hole design works for drip collection and some hydroponic uses
- Fits 20 x 10-inch grow pads
- Sturdy plastic construction supports repeated use
Cons:- No drain holes require careful watering to prevent standing water
- No individual cells or humidity domes for conventional seed starting
- Tapered sides make the bottom footprint smaller than the top
Best for: Greenhouse growers raising microgreens or wheatgrass on pads, running shallow hydroponic setups, or needing solid catch trays.
Not ideal for: Seed growers who need individual cells, drainage holes, or humidity domes for conventional seedling propagation.
- Brand:Living Whole Foods
- Quantity:10 trays
- Material:Plastic
- Top dimensions:20.5 x 10.125 inches
- Bottom dimensions:19.875 x 9.375 inches
- Depth:2.375 inches
- Drain holes:None
- Capacity:27 cups
Our verdict“Choose these trays for microgreens, grow pads, or runoff collection, not for starting separated seedlings like the Burpee or Bonviee kits.”
Mr. Pen Seed Starter Tray Kit, 10-Pack, 400 Cells
For greenhouse growers who want to start many varieties at once, the 400-cell capacity is the main reason to choose this Mr. Pen kit. Ten 40-cell trays let you separate batches or stagger sowing, while the clear, vented humidity domes help retain moisture without hiding seedlings from view. It also includes a dibber and widger, useful additions for sowing and moving young plants. Compared with the MIXC 10-Pack 120-Cell Kit, this set offers far more planting spots, but its cells are arranged for volume rather than the larger-seed focus of Bonviee’s 12-cell trays. The tradeoff is that it is listed for indoor use, so greenhouse buyers should check whether its intended use suits their setup. Choose it for many small starts, not for fewer plants needing roomy cells.
Pros:- 400 cells spread across ten trays support large and varied sowing batches
- Vented clear domes help manage humidity while keeping seedlings visible
- Includes matching base trays for each seed tray
- Dibber and widger provide basic sowing and transplanting tools
Cons:- Listed for indoor use, which may not suit buyers seeking a kit specified for outdoor greenhouse conditions
- High cell count favors many small starts over roomy cells for larger seeds
Best for: Greenhouse gardeners, schools, and community growing groups starting many small-seeded plants in separate batches
Not ideal for: Growers who need outdoor-use labeling or larger cells for sizable seeds and longer early growth
- Brand:Mr. Pen
- Quantity:10 trays
- Total cells:400
- Cells per tray:40
- Included components:10 base trays, 10 seed trays, 10 transparent vented domes, dibber, and widger
- Dimensions:14.5 x 9 x 4.3 inches
- Usage:Indoor
Our verdict“Choose this Mr. Pen kit when maximizing the number of small seedlings matters more than larger cells or outdoor-use specifications.”
Bonviee Seed Starter Trays with 12-LED Grow Lights, Clear, 5 Pack
The Bonviee lighted kit suits growers who need seed trays and a small amount of supplemental lighting in one setup. Its five integrated 12-LED full-spectrum lights distinguish it from the unlit Bonviee 12-cell tray set, while the 60 cells provide more starts than that set’s 12-per-tray format suggests at first glance. Clear trays, vented domes, and drainage holes support monitoring and bottom watering, which can help when seedlings are kept on a greenhouse bench or indoors nearby. The lights run by USB, but the power adapter is not included, and there is no built-in timer, so buyers must supply a compatible power source and manage light cycles themselves. This is a better fit for modest batches needing extra light than for growers already equipped with greenhouse lighting or seeking automated control.
Pros:- Integrated full-spectrum LED lights provide supplemental illumination at each tray
- 60 cells across five trays support several small sowing batches
- Vented domes and clear trays make humidity and seedling growth easier to monitor
- Drainage holes support bottom watering
Cons:- USB power adapter is not included
- No built-in timer for scheduled lighting
- Integrated lights may be redundant for greenhouses already equipped with grow lighting
Best for: Small-space greenhouse and indoor growers who need supplemental seedling light for a modest number of starts
Not ideal for: Growers with established greenhouse lighting, a need for automated light cycles, or no suitable USB power source
- Brand:Bonviee
- Tray count:5
- Cell count:60 total; 12 per tray
- Light type:12-LED full-spectrum
- Power source:USB; adapter not included
- Dimensions:5.7 x 8.5 x 5.5 inches
- Included components:5 trays, 5 domes, 5 lights, 1-to-5 USB cable, and 10 labels
Our verdict“Pick this Bonviee kit when you need compact trays with supplemental LEDs and are comfortable supplying power and managing light timing.”
Bonviee 5-Pack Seed Starter Trays with Humidity Domes and Adjustable Vents
Unlike the LED-equipped Bonviee kit, this five-pack puts its emphasis on 1.5-inch-square cells rather than built-in lighting. Those larger cells give comparatively sizable seeds more room at the start, and the trays are compatible with heat mats for growers who want to add bottom heat separately. Clear trays help with root observation, while adjustable vents give more control over moisture than a fixed, closed cover. Each tray has only 12 cells, so this is a deliberate low-volume choice rather than a way to maximize greenhouse bench output; the Mr. Pen 400-cell kit is far better suited to mass sowing. The indoor-use listing also makes this less flexible for growers seeking an explicitly indoor-and-outdoor option. Choose it for roomy starts and hands-on humidity management, not sheer quantity.
Pros:- 1.5-inch-square cells give larger seeds more starting room
- Adjustable vents allow hands-on humidity management
- Clear trays make root growth easier to observe
- Compatible with heat mats
Cons:- Only 12 cells per tray limits the number of seedlings started at once
- Listed for indoor use
- Heat mat is not included in the stated kit components
Best for: Greenhouse gardeners starting larger seeds in small batches and using heat mats for germination
Not ideal for: High-volume growers who need many planting spots or buyers looking for a kit specified for outdoor use
- Brand:Bonviee
- Quantity:5 trays
- Cells per tray:12
- Cell size:1.5 x 1.5 inches
- Included components:5 clear trays, 5 black base trays, 5 clear lids, 5 adjustable vents, and 10 plant labels
- Dimensions:4.4 x 4.4 x 6.1 inches
- Usage:Indoor
Our verdict“Choose this Bonviee set for a small batch of larger-seeded plants when cell room matters more than total capacity.”
MIXC 10-Pack Seed Starter Tray Kit with 120 Cells and Humidity Domes
The MIXC 10-pack earns its place for growers who want trays they can use across indoor shelves and outdoor greenhouse areas. Its indoor-and-outdoor suitability gives it a placement advantage over the indoor-listed Mr. Pen and Bonviee kits, while ten separate trays make it easier to group varieties or move smaller batches. The 120 cells are a middle ground: substantially fewer than Mr. Pen’s 400, but enough for a broad home sowing plan without committing to one large tray. Watertight bases, drainage holes, and adjustable vents combine to support watering and humidity control, and labels help keep varieties organized. The tradeoff is lightweight plastic, which may not hold up as well to repeated handling as sturdier tray materials. This is a practical flexible-use set, not the pick for maximum cell count or heavy-duty construction.
Pros:- Specified for indoor and outdoor use
- Ten separate trays make it easy to sort varieties and move batches
- Watertight bases, drainage holes, and adjustable vents support moisture management
- Plant labels are included for identifying sowings
Cons:- 120 cells are fewer than the 400-cell Mr. Pen kit
- Lightweight plastic may be less durable than sturdier tray materials
Best for: Home greenhouse growers who want multiple manageable trays for both indoor and outdoor growing areas
Not ideal for: Growers prioritizing maximum cell capacity or seeking sturdier construction for frequent, rough handling
- Brand:MIXC
- Tray count:10
- Cell count:120
- Included components:10 trays, 10 watertight base trays, 10 humidity domes, and 10 plant labels
- Features:Adjustable vents, drainage holes, reusable
- Dimensions:7.28 x 5.67 x 6.5 inches
- Usage:Indoor and outdoor
Our verdict“Pick the MIXC 10-pack if flexible indoor and outdoor placement matters more than maximum capacity or heavy-duty materials.”
MIXC 5-Pack Seed Starter Tray Kit with Humidity Domes
This MIXC kit is the more compact choice for growers who want a handful of organized starts rather than the larger run offered by its 10-tray, 120-cell MIXC counterpart. It includes five seed trays, bottom trays, humidity domes, two garden tools, and labels, so the basic sowing setup is bundled together. Stackable bottom trays can help reduce storage demands between uses, while transparent plastic and adjustable vents let growers observe seedlings and regulate humidity. Its stated indoor-and-outdoor use adds flexibility around a greenhouse, although the 1.5 x 1.5 x 2-inch cells are intended for small seeds and limit how long larger seedlings can remain in them. This kit makes sense for a smaller planting plan or limited storage, but buyers needing more starts should favor the 10-pack rather than buying multiple smaller sets.
Pros:- Five trays suit smaller sowing plans and are easier to organize than a larger kit
- Stackable bottom trays help save storage space
- Adjustable vents and transparent trays support monitoring and humidity control
- Includes two garden tools and ten plant labels
Cons:- Cells are intended for small seeds and may constrain larger seedlings
- Five trays provide less capacity than the 10-tray MIXC kit
Best for: Greenhouse gardeners starting small seed batches who value stackable trays and included sowing tools
Not ideal for: Growers raising larger seeds or needing enough cells for a high-volume planting schedule
- Brand:MIXC
- Tray count:5
- Cell size:1.5 x 1.5 x 2 inches
- Humidity dome height:2.75 inches
- Included components:5 seed trays, 5 bottom trays, 5 humidity domes, 2 garden tools, and 10 plant labels
- Product dimensions:14.57 x 9.02 x 5 inches
- Usage:Indoor and outdoor
Our verdict“Choose this MIXC set for compact, small-seed batches with handy included tools, but select the 10-pack for greater planting capacity.”
How We Picked
I ranked these greenhouse seed starting trays by how well their format fits real sowing tasks: batch size, cell layout, included bases or humidity domes, lighting features, and the likely effort required to water and organize seedlings. I gave more weight to useful combinations than to headline cell counts alone. A kit with a manageable number of trays and helpful accessories can be easier to use than a larger pack that demands extra setup.
The order reflects distinct buyer needs, not a claim that one tray suits every crop. I favored versatile kits near the top, then placed specialized options—such as LED-equipped sets, small reusable trays, and hole-free flats—where their advantages are most valuable. Because product names and listed features do not establish material thickness, long-term durability, or greenhouse fit, I avoid treating those details as proven; buyers should check dimensions and construction before ordering.
| greenhouse seed starting tray | Brand |
|---|---|
| Gardzen 30-Pack 6-Cell Seed St | Gardzen |
| Bonviee Seed Starter Trays wit | Bonviee |
| Seed Starter Trays | The Hydroponic City |
| MIXC 5-Pack Seed Starter Tray | MIXC |
| 10-Pack Seed Starter Trays wit | — |
| Bonviee 5-Pack Seed Starter Tr | Bonviee |
| Gardzen Seed Starter Tray Kits | Gardzen |
| Bonviee 5-Pack Seed Starter Tr | Bonviee |
| Burpee SuperSeed 36-Cell Reusa | — |
| Living Whole Foods Black Plast | Living Whole Foods |
| Mr. Pen Seed Starter Tray Kit | Mr. Pen |
| Bonviee Seed Starter Trays wit | Bonviee |
| Bonviee 5-Pack Seed Starter Tr | Bonviee |
| MIXC 10-Pack Seed Starter Tray | MIXC |
| MIXC 5-Pack Seed Starter Tray | MIXC |
Factors to Consider When Choosing Greenhouse Seed Starting Trays
I’d choose trays around the way I sow, water, and move seedlings—not just the largest number printed on the package. These factors help match a kit to greenhouse bench space, crop type, and the amount of hands-on care you want.
Match Cell Count to Your Sowing Plan
Start with the number of plants you actually expect to raise in one batch. A 400-cell set can help when sowing many small-seeded crops, but it can also consume bench space and create more seedlings to label, water, and transplant at once. Larger cells are often more practical for crops that stay in their trays longer, while smaller cells make efficient use of space for quick-start plants. Avoid buying by total cell count alone: check whether those cells are divided among several trays and whether you can use only part of the set. A modular pack makes it easier to stagger sowing dates and keep different crops separate.
Check Tray Footprint Before Cell Dimensions
Greenhouse benches, shelves, and propagation mats have fixed footprints, so the outside dimensions of the tray can matter more than a cell’s advertised capacity. Measure the usable surface and leave room to reach plants, lift covers, and drain or remove a base tray. Several compact trays may fit a narrow shelf better than one broad unit, even if both offer similar cell totals. A mismatch can block airflow or make routine watering awkward. When dimensions are not clear in the product listing, confirm them rather than guessing from photos.
Choose Humidity Control for the Crop and Climate
A humidity dome can help keep the sowing medium from drying too quickly before germination, especially in a warm or drafty greenhouse. It is not a set-and-forget cover: seedlings need airflow as they emerge, and excess moisture can encourage poor growing conditions. Adjustable vents offer more control, but they still require attention as conditions change through the day. In a naturally humid greenhouse, a dome may add little and can make monitoring more important. Consider whether you want the convenience of an included cover or prefer to manage moisture with your existing setup.
Plan Watering and Drainage Together
Drain holes let excess water leave the root zone, while a base tray can catch runoff or support bottom watering. These features work as a system: drainage without a catch surface can make a mess, while a solid-bottom tray can leave water sitting around cells if you overfill it. Hole-free flats such as the Living Whole Foods set can serve as catch trays, but they should not be mistaken for standard draining cell trays. Before sowing, decide whether you will water from above or below and where runoff will go. This small planning step can prevent uneven moisture and extra handling later.
Decide Whether Built-In Lights Solve a Real Gap
LED-equipped kits can simplify a compact propagation station when natural light is limited, but a light included with a tray is not automatically a full greenhouse lighting solution. Check how the lights are positioned, whether their height can be adjusted, and how the power setup fits your bench. If your greenhouse already provides strong, even light, a basic tray kit may be a better use of space and equipment. If seedlings stretch in your current setup, supplemental lighting may address a genuine need. Compare the light’s practical coverage with the area you intend to sow, not just the number of LEDs.
Weigh Reuse, Storage, and Replacement
Reusable trays can reduce repeat purchases, but their value depends on how carefully they can be cleaned, dried, and stored between seasons. Thin or highly divided formats may be harder to handle when full, while rigid trays can take more storage room. A large multipack is useful only if you have space to keep unused pieces clean and out of the way. For a first season, a smaller kit can reveal which cell size and cover style suit your crops before you commit to a bulk set. Check product details for care guidance and material information when repeated use is a priority.
Frequently Asked Questions
Should I choose a 200-cell kit or a 400-cell kit for a greenhouse?
Choose based on how many plants you can care for and transplant, not the largest available count. The MIXC 200-cell kit offers substantial capacity in a five-tray format, while the Mr. Pen 400-cell kit is better suited to large, coordinated sowings. More cells mean more labels, watering checks, and seedlings competing for bench space. If you sow in stages or grow a mix of crops, a smaller or modular setup can be easier to manage. Measure your available surface before choosing either pack.
Do I need a humidity dome for starting seeds in a greenhouse?
Not always. A dome can slow moisture loss during germination, but a greenhouse may already provide warm, humid conditions, making a cover unnecessary for some sowings. Once seedlings emerge, they need airflow, so a dome that stays closed can cause problems rather than help. Consider a vented option if you want more control, and plan to check the cover regularly. If you already have a reliable way to manage moisture, basic trays may be enough.
Can I use trays without drainage holes for seed starting?
You can use a hole-free tray as a catch surface or for carefully controlled bottom watering, but standing water can leave seedling roots too wet. The Living Whole Foods flats in this roundup have no drain holes, so they are not a direct substitute for standard draining cell trays. Pair a solid tray with containers that do have drainage, or monitor water levels closely if using it to hold water. For most new growers, drainage in the growing container is simpler to manage. Keep runoff and watering habits in mind before choosing a hole-free format.
Are trays with built-in LED lights worth choosing over a basic kit?
They make the most sense when your greenhouse lacks even, usable light for the seedling area or when you want a compact propagation station. The Bonviee light-equipped kits combine trays with 12 LEDs, while simpler kits leave lighting to your existing setup. Check coverage and light positioning against the area you will sow; the presence of LEDs alone does not confirm that the setup meets every crop’s needs. If your greenhouse already gets strong light, the added equipment may be unnecessary. Buyers should also account for the electrical setup and space around the tray.
Which tray style is easier for a first-time seed starter?
A kit with a clear, simple layout and a base or humidity cover can reduce the number of separate pieces you need to find before sowing. The Bonviee 12-cell dome-and-base options keep batches small, while larger kits ask you to manage more seedlings at once. A clear cover can help you observe moisture and germination, but it still needs ventilation as plants emerge. Beginners should prioritize a manageable batch size and straightforward watering over maximum capacity. Starting with fewer cells also makes it easier to learn which crops suit your greenhouse conditions.
Conclusion
For most greenhouse growers, I recommend the MIXC 5-Pack, 200 Cells as the best overall balance of capacity and manageable organization. The best value-style choice for large batch sowing is the 144-cell set with plant stakes, while the best premium-style feature pick is a Bonviee LED kit for a propagation area that needs added light. Beginners may prefer a 12-cell Bonviee dome-and-base kit to keep early batches small and contained. For high-volume sowing, choose the Mr. Pen 400-cell kit; for a compact run, the Burpee 36-cell reusable tray; and for catching runoff or controlled watering, the Living Whole Foods hole-free flats. Match the final choice to your bench dimensions, drainage plan, and realistic seedling count.
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