Greenhouse & Tunnel Supplies | Johnny's Selected Seeds

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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 greenhouse film; 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.

Planning Tools & Calculators | Interactive Apps & Spreadsheets from Johnny's

42 Products

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Tufflite IV™ – 28' x 125' Tufflite™

Tufflite IV™ – 28' x 125'

Greenhouse Film

28-feet wide x 125-feet long

High Tunnel Vent w/ Auto Opener – 24" x 24" Vents and Vent Openers

High Tunnel Vent w/ Auto Opener – 24" x 24"

Provides additional greenhouse ventilation in hot conditions.

Tufflite IV™ – 28' x 65' Tufflite™

Tufflite IV™ – 28' x 65'

Greenhouse Film

28-feet wide x 65-feet long

Univent Automatic Opener Vents and Vent Openers

Univent Automatic Opener

Keep your cold frame plants in their "comfort zone."

High Tunnel Vent w/ Auto Opener – 12" x 12" Vents and Vent Openers

High Tunnel Vent w/ Auto Opener – 12" x 12"

Provides additional greenhouse ventilation in hot conditions.

Tufflite IV™ – 28' x 100' Tufflite™

Tufflite IV™ – 28' x 100'

Greenhouse Film

28-feet wide x 100-feet long

High Tunnel Vent w/ Auto Opener – 30" x 30" Vents and Vent Openers

High Tunnel Vent w/ Auto Opener – 30" x 30"

Provides additional greenhouse ventilation in hot conditions.

Tufflite IV™ – 20' x 125' Tufflite™

Tufflite IV™ – 20' x 125'

Greenhouse Film

20-feet wide x 125-feet long

Tufflite IV™ – 24' x 125' Tufflite™

Tufflite IV™ – 24' x 125'

Greenhouse Film

24-feet wide x 125-feet long

High Tunnel Vent w/ Auto Opener – 18" x 18" Vents and Vent Openers

High Tunnel Vent w/ Auto Opener – 18" x 18"

Provides additional greenhouse ventilation in hot conditions.

Tufflite IV™ – 32' x 100' Tufflite™

Tufflite IV™ – 32' x 100'

Greenhouse Film

32-feet wide x 100-feet long

Out Of Stock

Sidewall Hand Crank Hardware & Accessories

Sidewall Hand Crank

Quickly adjust tunnel sidewalls and hold them at desired height.

Gothic Tunnel Peak Jig Benders

Gothic Tunnel Peak Jig

Quick Hoops™ Accessory

Bend gothic arch-shaped bows to shed snow more efficiently.

Poly Patch Repair Tape – 6" Hardware & Accessories

Poly Patch Repair Tape – 6"

For everything from small patch jobs to splicing large sheets together.

Poly Patch Repair Tape – 4" Hardware & Accessories

Poly Patch Repair Tape – 4"

For everything from small patch jobs to splicing large sheets together.

Cross Connectors – 2 Count Hardware & Accessories

Cross Connectors – 2 Count

Save time, money and make structures stronger.

Poly Latch Wire, 4' – 20 Count Hardware & Accessories

Poly Latch Wire, 4' – 20 Count

Convenient system for securing high tunnel coverings.

Poly Latch Channel, 8' – 10 Count Hardware & Accessories

Poly Latch Channel, 8' – 10 Count

Convenient system for securing high tunnel coverings.