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

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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Trays, Domes & Flats

50 Cell Plug Flats – 5 Count

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

Microgreens Reservoir Tray

Microgreens Accessory

Microgreens Growing Tray

Microgreens Accessory

Jumbo Plug Inserts – 5 Count

Soil Block Propagation Trays – 5 Count

2" Clear Acrylic Domes – 5 Count

128 Cell Plug Flats – 5 Count

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

7" Clear Propagation Domes – 5 Count

Heavyweight Mesh Tray – 5 Count

Lightweight Shallow Trays – 5 Count

SureRoots® 50-Cell Deep Plug Flats – 5 Count

5x5 Inserts – 5 Count

Microgreens Accessory

Polypro 5x5 Insert Pots – Black, 8 Count

Medium Weight Mesh Tray – 5 Count

20-Row Seed Flats – 5 Count

Polypro 5x5 Insert Pots – Blue, 8 Count

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

Polypro 2.5" Insert Pots – Black, 32 Count

Pro-Tray 24 Cell Flats – 5 Count

200 Cell Plug Flats – 5 Count

Heavyweight Mesh Tray – 50 Count

6-Cell Tray Inserts – 24 Count

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

Pro-Tray 38 Cell Flats – 5 Count

Polypro 5x5 Insert Pots – Red, 8 Count

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

Polypro Mesh Deep Tray, Black – 4 Count

Lightweight Shallow Trays (with Holes) – 5 Count

Paperpot Seedling Trays – 10 Count

Paperpot Transplanter Accessory

Polypro 2.5" Insert Pots – Red, 32 Count

NanoDome – Single

LED or T5HO Strip Light Accessory

Soil Block Propagation Trays – 50 Count

Pro-Tray 72 Cell Flats – 5 Count

6-Cell Tray Inserts – 6 Count