Seed Starting Supplies
Johnny's offers all the seed-starting and propagation supplies you need to grow your own professional-quality seedlings with efficiency. Growing your own transplants from seed provides greater control over the growing season, from start to finish, by allowing you to choose your favorite varieties, select specific planting and transplanting dates, and produce the quantities of plants you need.
246 Products
Sort By:
Sort By:
Soil Block Propagation Trays – 5 Count
These wide-mesh bottom trays are ideal for soil block propagation.
Heat Mat Temperature Controller
Johnny's Heat Mat Accessory
Must-have for consistent temperature control with heat mats.
Grafting Support Stakes
Top-Grafting Clips with Channel Accessory
Secure plants in place for proper graft healing.
NanoDome – Single
LED or T5HO Strip Light Accessory
Humidity dome with groove for resting a grow light.
Paperpot Seedling Trays – 10 Count
Paperpot Transplanter Accessory
Tray sized specifically for Paper Chain Pots.
Link Cord – 14"
LED or T5HO Strip Light Accessory
Add on to your strip lights for more growing space.
Strip Light Hanger
LED or T5HO Strip Light Accessory
Expand your lighting to grow bigger, healthier plants.
Link Cord – 24"
LED or T5HO Strip Light Accessory
Add on to your strip lights for more growing space.
Long Dibbles
Soil Blocker Accessory
Use with soil blockers to create dibbled holes for seeds or cuttings.
Soil Block Propagation Trays – 50 Count
These wide-mesh bottom trays are ideal for soil block propagation.
Standard Dibbles
Soil Blocker Accessory
Use with soil blockers to create dibbled holes for smaller seeds.
Paperpot Seedling Tray – Individual
Paperpot Transplanter Accessory
Tray sized specifically for Paper Chain Pots.
NanoDome – 5 Count
LED or T5HO Strip Light Accessory
Humidity dome with groove for resting a grow light.
Connector Set
Johnny's Modular LED Grow Light Cart Accessory
Locks two Johnny's Modular LED Grow Light Carts together.
Power Cord with On/Off Switch
LED or T5HO Strip Light Accessory
Design your own custom seedling growing space.
8 and 16-Tray Light Cart Replacement LED Tube – 48", 1 Count
Replacement tube for #6221 and #6248 light carts.
Hanging Clips
LED or T5HO Strip Light Accessory
Ideal for suspending SunBlaster lighting above your growing area.
NanoDome – 25 Count
LED or T5HO Strip Light Accessory
Humidity dome with groove for resting a grow light.
Hang It Adjustable Hanger
LED or T5HO Strip Light Accessory
Quickly adjust the height of lighting as plants grow.
Out Of Stock
