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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Snap Clamps for 3/4" PVC or 1" EMT Hardware & Accessories

Snap Clamps for 3/4" PVC or 1" EMT

Quickly fasten row covers to low tunnels.

Snap Clamps for 1" PVC or Chain Link Fence Top Rail Hardware & Accessories

Snap Clamps for 1" PVC or Chain Link Fence Top Rail

Quickly fasten row covers to low tunnels.

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

Poly Latch Wire, 4' – 20 Count

Convenient system for securing high tunnel coverings.

End Rail Clamp, 1 3/8" – 10 Count Hardware & Accessories

End Rail Clamp, 1 3/8" – 10 Count

A very versatile piece of greenhouse hardware.

Brace Band, 1 3/8" – 20 Count Hardware & Accessories

Brace Band, 1 3/8" – 20 Count

For securing the ends of collar ties and angle braces to bows.

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

Poly Latch Channel, 8' – 10 Count

Convenient system for securing high tunnel coverings.