Humidity Domes | 100% Guaranteed | Johnny's Selected Seeds

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Provide the perfect environment for germination by covering your flat with a plastic dome that helps retain moisture and warmth. Remove the dome once the seeds emerge to reduce the risk of disease. Use in conjunction with a heat mat for faster, more uniform germination of heat-loving crops. Choose from our durable clear plastic humidity domes and our propagation domes. To compare products, including compatibility across products, see our Humidity Domes Dynamic Comparison Chart (at right).

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

11 Products

2" Clear Acrylic Domes – 5 Count Humidity Domes

2" Clear Acrylic Domes – 5 Count

Holds moisture and warmth for germination.

7" Clear Propagation Domes – 5 Count Humidity Domes

7" Clear Propagation Domes – 5 Count

Create the perfect healing chamber for grafted tomatoes.

3" Humidity Dome – 6 Count Grow Lights and Carts

3" Humidity Dome – 6 Count

Perma-Nest Tray Accessory

Standard domes for Perma-Nest Trays.

2" Clear Acrylic Domes – 50 Count Humidity Domes

2" Clear Acrylic Domes – 50 Count

Holds moisture and warmth for germination.

5 1/2" Vented Humidity Dome – 4 Count Grow Lights and Carts

5 1/2" Vented Humidity Dome – 4 Count

Perma-Nest Tray Accessory

Tall domes for Perma-Nest Trays.

NanoDome – Single Grow Lights and Carts

NanoDome – Single

LED or T5HO Strip Light Accessory

Humidity dome with groove for resting a grow light.

5 1/2" Vented Humidity Dome – 1 Count Grow Lights and Carts

5 1/2" Vented Humidity Dome – 1 Count

Perma-Nest Tray Accessory

Tall domes for Perma-Nest Trays.

7" Clear Propagation Domes – 25 Count Humidity Domes

7" Clear Propagation Domes – 25 Count

Create the perfect healing chamber for grafted tomatoes.

3" Humidity Dome – 24 Count Grow Lights and Carts

3" Humidity Dome – 24 Count

Perma-Nest Tray Accessory

Rests on top of Perma-Nest trays.

Sale

NanoDome – 5 Count Grow Lights and Carts

NanoDome – 5 Count

LED or T5HO Strip Light Accessory

Humidity dome with groove for resting a grow light.

Sale

NanoDome – 25 Count Grow Lights and Carts

NanoDome – 25 Count

LED or T5HO Strip Light Accessory

Humidity dome with groove for resting a grow light.