DIY Gothic Greenhouse Kit

DIY Gothic High Tunnel

Our brand-new DIY greenhouse kit is designed for growers who want the snow-shedding benefits, taller sidewalls, and interior headroom of a gothic arch greenhouse. With extra clearance for trellising, airflow, and tall crops, this DIY Gothic high tunnel makes it easy to extend your season and grow more.

These gothic greenhouse kits are designed to save you money on shipping by requiring the purchase of metal and lumber locally. We’ve provided information below from Lowe’s and Home Depot with part numbers and their respective prices* (as of 2025) to help you source what you need. 

Check out this quick start guide video for an overview of the build.

See our entire selection of DIY greenhouse kits, which require the purchase of local wood and metal, or shop our inventory of USA-made All-Metal Greenhouse Kits for complete kits.

Not eligible for returns. 

Features

• Available in 14’ or 20’ widths and 20’, 40’, 60’, 80’, 100’ lengths
• 14’ wide stands approx. 12.5’–13.5’ tall; 20’ wide stands approx. 15.5’–16.5’ tall
• Gothic arch sheds snow better than round hoop designs
• Taller sidewalls and extra interior headroom for trellising tall crops
• Steeper pitch improves water runoff
  
• Ideal for growers in snow-prone climates
• FREE SHIPPING - Ready to ship in 2-3 business days

For more information on freight delivery, click here.

Greenhouse Kit Includes:  

• DIY gothic preformed peaks
• Spring lock wire and lock channel to keep your greenhouse plastic secure (assumes a single door on your high tunnel). Additional channel may be necessary for a double door or windows.
• Ground post driver to drive your ground posts safely into the ground
• 1 3/8" x 1 3/8" cross connectors to attach arches to ridge poles and to purlins
• Greenhouse Plastic 4 Year 6 mil.  Sized to cover the entire greenhouse, including end walls.  (it may take an additional week to arrive if freight shipment is required)
• All required screws, nuts, bolts, and connectors for pole and frame components
• Instructions for the build
• Printable Buy Local Chart
  
• Lumber and  1 3/8" Top Rail is not included.  We want to save you money. Buying this locally will save you thousands, which is why we don't include it. We want you to build a high-quality greenhouse at the most affordable price. See our "Purchase Locally" below for help ordering all the lumber and top rail.

*Lumber choices may be limited by location. Redwood, cedar, or pressure-treated are the best choices for any structure that will be exposed to moisture.

SEEDTIME FULFILLED SHIPPING (items fulfilled by Seedtime)

• We ship to the USA only.
• We offer free shipping on all products fulfilled by Seedtime with an order value over $49
• Orders placed before 12pm Eastern Time ship the same day. Orders after 12pm Eastern Time will ship the next business day. Timing applies to orders in the lower 48 States.
• Standard delivery time is 3-7 business days.
• Easy 30 day returns or exchanges.

RETURNS

Your satisfaction means the world to us which is why all of your orders are backed with our 30 Day Satisfaction Guarantee. Either you love it, or you can return it for an equal exchange or get a full refund. Just send us a support ticket to support@seedtime.us and we'll be glad to help you with your return.

Other Vendor Fulfilled Shipping & Returns

We offer products that are fulfilled by other vendors. Vendors shipping rates and return policies may vary and returns may be subject to a restocking fee. Please reach out to support@seedtime.us for any specific questions on vendor shipping or return policies.