Know your numbers before you build
our featuresWhy Grow with T3
T3 Greenhouse Supply manufactures durable, automation-ready greenhouses in California using American steel and U.S.-made components. Whether you’re a backyard garden hobbyist or a commercial farmer building for scale, our greenhouse kits and custom builds are engineered for year-round growing, long-term reliability, and affordability — with options for internal shading, light deprivation, automated irrigation, and climate integration.
Built in California. Engineered for Growers.
At T3 Greenhouse Supply, we build professional-grade, American-made greenhouses in Shasta Lake, California—engineered for everyone from backyard gardeners and homesteaders to commercial growers running high-output operations. Every structure is designed and fabricated in-house, delivering heavy-duty strength, all-season performance, and long-term durability.
For customers who want a premium finish, we offer in-house powder coating for select builds. We also specialize in light deprivation greenhouse systems, with automation-ready blackout solutions designed for consistent control and reliable results.
What They Say
Pay at your own pace.
Just select affirm at checkout.