Greenhouse and Tunnel Supplies
Whether you grow from earliest spring to late fall or run your production year-round, our season-extension supplies provide the versatility and durability you need to protect your crops from the elements. We offer row covers in a range of lengths and densities; benders and jigs for high tunnels and low tunnels; and supports, anchors, and hardware to keep it all together.
Use our calculators and construction manuals to plan ahead, estimate costs, and determine the right season-extension configuration, components, and quantities.
Done
New
For everything from small patch jobs to splicing large sheets together.
New! For everything from small patch jobs to splicing large sheets together.
New
For securing the ends of collar ties and angle braces to bows.
New! For securing the ends of collar ties and angle braces to bows.
New
A very versatile piece of greenhouse hardware.
New! A very versatile piece of greenhouse hardware.
New
For everything from small patch jobs to splicing large sheets together.
New! For everything from small patch jobs to splicing large sheets together.
New
For everything from small patch jobs to splicing large sheets together.
New! For everything from small patch jobs to splicing large sheets together.
New
For everything from small patch jobs to splicing large sheets together.
New! For everything from small patch jobs to splicing large sheets together.
New
Now available in customizable lengths, in increments of 5 ft.
New! Now available in customizable lengths, in increments of 5 ft.
New
Now available in customizable lengths, in increments of 5 ft.
New! Now available in customizable lengths, in increments of 5 ft.
New
Now available in customizable lengths, in increments of 5 ft.
New! Now available in customizable lengths, in increments of 5 ft.
Save time, money and make structures stronger.
Save time, money and make structures stronger.
Securely locks high tunnel covers into the Poly Latch Channel.
A convenient, reusable, and high-integrity connection system for high tunnel plastic and other cover materials.
Johnny's Exclusive
Bends 12' wide rigid half-pipe for DIY high tunnel. Lever bar included.
Ultimate versatility in low-cost protected cropping and season extension.
Attaches to high tunnel frames, baseboards, and hipboards.
A convenient, reusable, and high-integrity connection system for high tunnel plastic and other cover materials.
Johnny's Exclusive
Hoophouse-style protection at 1/20th the cost.
Hoophouse-style protection at 1/20th the cost.
Bends gothic arch-shaped bows to shed snow more efficiently.
Bends gothic arch-shaped bows to shed snow more efficiently.
24-feet wide x 65-feet long
Protects crops from excessive rain, wind, and frost under high tunnels.
Johnny's Exclusive
Bends 13-14' wide hoops that compress into ground posts for high tunnel.
Protect your crops and extend your season early in the spring and late in the fall.
Long-radius arch design for areas with little or no snow load.
Long-radius arch design for areas with little or no snow load.