Seed Starting Trays, Domes & Flats | Johnny's Selected Seeds

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Johnny's offers a selection of seed starting trays, flats, and humidity domes to accommodate whatever it is you decide to grow. All of our seedling products follow industry 1020 tray standard size (actual footprint: 11" x 21"). We offer supplies that are economical enough to be disposable, but are heavy-duty enough to be reusable over multiple seasons, including: germination trays with and without drainage holes; microgreens trays; mesh trays; cell flats; and clear plastic domes. Available in small and case quantities. To compare products, including compatibility across products, see our Trays, Domes & Flats Comparison Chart (at right).

Seed-Starting Flats, Trays, Domes & Pots | Comparison Chart (PDF)

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Polypro Endurance Shallow Speed Tray (No Holes), Black – 4 Count Support Trays

Polypro Endurance Shallow Speed Tray (No Holes), Black – 4 Count

Reinforced trays with "bumpers" for soil block alignment.

Sale

Polypro Endurance Shallow Speed Tray (No Holes), Black – 24 Count Support Trays

Polypro Endurance Shallow Speed Tray (No Holes), Black – 24 Count

Reinforced trays with "bumpers" for soil block alignment.

Sale

Lightweight Deep Trays – 5 Count Support Trays

Lightweight Deep Trays – 5 Count

The standard 1020 greenhouse flat without drainage slots.

Sale

72 Cell Plug Flats – 5 Count Cell Flats

72 Cell Plug Flats – 5 Count

Designed for fresh market growers. Square cells.

Sale

2" Clear Acrylic Domes – 5 Count Humidity Domes

2" Clear Acrylic Domes – 5 Count

Holds moisture and warmth for germination.

Sale

50 Cell Plug Flats – 5 Count Cell Flats

50 Cell Plug Flats – 5 Count

Designed for fresh market growers. Square cells.

Sale

Jumbo Plug Inserts – 5 Count Cell Flats

Jumbo Plug Inserts – 5 Count

Large cell flats can be separated into six-packs.

Sale

128 Cell Plug Flats – 5 Count Cell Flats

128 Cell Plug Flats – 5 Count

Designed for fresh market growers. Square cells.

Sale

Polypro Endurance Deep Tray (No Holes), Black – 4 Count Support Trays

Polypro Endurance Deep Tray (No Holes), Black – 4 Count

Johnny's thickest wall trays.

Sale

Lightweight Shallow Trays – 5 Count Support Trays

Lightweight Shallow Trays – 5 Count

A great multi-use tray for any operation.

Sale

Microgreens Reservoir Tray Microgreens Supplies

Microgreens Reservoir Tray

Microgreens Accessory

Durable and reusable.

Sale

Soil Block Propagation Trays – 5 Count Trays, Domes, and Flats

Soil Block Propagation Trays – 5 Count

These wide-mesh bottom trays are ideal for soil block propagation.