American-made galvanized steel tubing, pre-drilled where it matters. Built for your first season and every one after, from a new market garden to a full commercial operation.
Grower, Grower Plus, and Grower Pro share the same engineering DNA: every kit ships with the hardware to install it and a double-inflated layer of 6-mil greenhouse plastic. Then there's the Home Owner's Greenhouse, a backyard build of its own.
Our most-chosen greenhouse and the right first build. Straightforward to raise, built from the same steel as its bigger siblings.
Everything in the kit to install it, outfitted for farms pushing through real winter weather. All the same main specs as Grower, with the addition of:
Our fully upgraded kit for commercial, year-round production. Built for the long haul, with full climate-control options. All the same specs as Grower Plus, with the addition of:
A polycarbonate backyard greenhouse that arrives fully assembled and ready to use: welded steel frame, 8mm twin-wall glazing, built-in benches, and a battery-powered roof that opens itself on warm days.
The honest comparison, so you can match a greenhouse to your climate and your plans. Everything here is a starting point, and every kit configures to your site.
| Specification | Grower | Grower Plus | Grower Pro |
|---|---|---|---|
| Main bow tubing | 1.9" 13-ga galvanized | 1.9" 13-ga galvanized | 1.9" 13-ga galvanized |
| Purlins | 1.315" 16-ga | 1.315" 16-ga | 1.315" 16-ga |
| Hardware | Grade 5 bolts, wirelock hip boards | Grade 5 bolts, wirelock hip boards | Grade 5 bolts, wirelock hip boards |
| Width range | 14–34 ft | 14–34 ft | 14–34 ft |
| Top covering | Double-inflated 6-mil | Double-inflated 6-mil | Double-inflated 6-mil |
| End walls | Steel-framed, 6-mil poly | Steel-framed, 8mm twin-wall polycarbonate | Steel-framed, 8mm twin-wall polycarbonate |
| Doors | Not included | 8'×7' double hinged | 8'×7' double sliding |
| Roll-up sides | Manual, 5:1 gear crank | Manual, 5:1 crank, bug netting | Manual, 5:1 crank, bug netting and woven roll-up material |
| Climate control | Fans & heaters optional | Fans & vents included | Fans, vents & automation options |
| Baseboards | Hardware for local lumber | Hardware for local lumber | Steel + polycarbonate system |
| Trellis / baskets | Add-on | Add-on | Trellis cables or basket pipes |
USDA's EQIP program can help cover a large share of an eligible structure. Working alongside your local NRCS office we'll get you the specs you need to make the most of your grant.
CT Greenhouse is not affiliated with USDA. Program rules, cost-share rates, and deadlines are set by NRCS and vary by state, so always confirm with your local office.
We're publishing these one state at a time so each one is accurate. Call an owner and we'll tell you what we know about your state's program and get your spec sheets started.
Literally the best greenhouse company out there. Durable structures, easily shipped and received, and the two guys who run it are incredibly knowledgeable and always pick up. Competitively priced and quality product — the best greenhouse company around, hands down.
While the basics of the frames are the same, the real difference lies in their use. High tunnels are built over your field for protected in-ground growing and season extension. Greenhouses are used for nursery crops and seed starting. Greenhouses often include more upgrades, including heat, double layer plastic, and fans, but there is no reason those things cannot be added to a high tunnel as well! Not sure which fits? See our high tunnels or call an owner.
Yes. Major frame connections come pre-drilled at the factory, and most kits go up with a small crew. We include build guidance, and an owner is on the phone whenever you need one.
All the hardware needed for installation and a double-inflated layer of 6-mil greenhouse plastic. Baseboard lumber and doors on the base Grower are not included. Your quote lists exactly what ships on the truck.
While the structures may be similar, the NRCS EQIP grant is specifically for high tunnels, meaning that you must be planning to grow in the ground in the tunnel for the length of your contract.
Pricing depends on your size, options, and site, so we quote each build individually. Call (860) 341-8707 or request a quote below and an owner will get back to you with real numbers.
We're farmer-owned out of Portland, CT and Afton, MN, and ship greenhouse kits to growers nationwide, with fast shipping and easy delivery. Tell us where you are and we'll sort out freight.
Tell us a little about your operation and an owner will get back to you with real numbers, not a sales script.
(860) 341-8707 · Portland, CT & Afton, MN
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