20 ft. DIY High Tunnel Greenhouse Kit: Build Your Own Hoop House

Whether you're expanding your grow operation or building your first serious high tunnel, our 20 ft. Wide High Tunnel Greenhouse Kit gives you the room to grow, at a price that doesn't require a second mortgage.

At nearly 11 feet tall at center, this is the widest kit in our DIY lineup and the right choice for growers who need serious square footage. Available in lengths from 20 to 100 feet, it scales to fit your land and your ambitions. Source your lumber and conduit locally (we'll show you exactly what to get), and you're building a professional-grade structure without the professional-grade price tag.

What's Included:

• Spring lock wire and lock channel for secure plastic attachment
• 4-year, 6 mil greenhouse plastic, sized to cover the full structure including end walls
• Ground post driver for safe, accurate post installation
• Cross connectors for 1-3/8" x 1-3/8" arch to ridge pole
• All required nuts, bolts, screws, and connectors for frame and poles
• Printable Buy Local Chart
• Printable Instructions

What's NOT Included (and why): Lumber and 1-3/8" top rail are not included, buying these locally saves you thousands. We've partnered with Lowe's and Home Depot to make it easy: see part numbers and pricing in our Buy Local Chart below.

Best lumber choices for moisture-exposed structures: redwood, cedar, or pressure-treated.

Greenhouse Dimensions:

Shipping & Notes:

• FREE SHIPPING, ships in 2-3 business days
• Assumes a single door configuration
• Not a complete kit, lumber and conduit not included
• Does not qualify for NRCS funding
• Not eligible for returns

And once your structure is up, check out our Greenhouse Tools and Climate Control supplies to keep your grow dialed in all season long.