T3 Greenhouse Supply
Built in the USA. Trusted by growers who expect more.
Shop Scalable Greenhouse Kits
From 6′ wide and beyond — customize your structure by size, style, trussing, and automation options. Built strong. Priced right. Delivered fast.
Explore the BloomBox 10×12
Our compact, solar-ready BloomBox is perfect for backyard growers, urban homesteads, and year-round harvests — with off-grid options, automation, and clean design.
Best Selling Greenhouses
Each of our greenhouses is available with a large range of customization and light deprivation options. Contact us to get a quote and learn more about the features for each model.
Our 30×100 Emerald Triangle Greenhouse features a durable Gothic-style frame—ideal for high snow load regions, cold climates, and licensed growers who demand year-round performance.
Emerald Triangle frame starting at $19,812.00
The Mount Shasta 30×100 Straight-Wall Greenhouse is our most popular Quonset-style design—engineered for strength in high-wind zones, open fields, and exposed farm sites. Trusted by farmers for its spacious interior and rugged frame.
Mount Shasta frame starting at $10,657.00
The Trinity 24×100 Straight-Wall Greenhouse is a top choice among Northern California farmers and homesteaders. This compact Quonset-style structure uses 1-5/8″ 14-gauge steel for reliable strength and is ideal for diversified growing on small farms, homesteads, or remote sites.
Trinity frame starting at $7,382.00
The Sundial 20×100 Straight-Wall Greenhouse is our most versatile entry-level model—built in a Quonset-style frame and inspired by Northern California’s iconic Sundial Bridge. Scalable in 5-foot increments, it’s perfect for backyard growers, hobby gardeners, or small personal cannabis use.
Sundial frame starting at $5,230.00
Why Growers Trust T3 Greenhouse Supply 🌿
Whether you’re growing in your backyard or running a licensed commercial cannabis farm, T3 Greenhouse Supply builds the tools you need to grow smarter — not harder. Learn more about us here.
From small-scale food production to automated light deprivation greenhouses, we’ve helped hundreds of growers across the country achieve indoor-quality results without the sky-high costs of indoor facilities.
Why Choose a T3 Greenhouse?
✅ Lower Startup Costs than indoor grow rooms.
✅ Massive Energy Savings — harness natural light, cut HVAC bills.
✅ Higher Yields per square foot with light dep & automation.
✅ Full Automation for lighting, irrigation, and climate control.
Whether you’re growing vegetables, flowers, or medical-grade cannabis, a T3 system gives you full control of your grow environment — without sacrificing nature’s power.
Built to Last. Built for Results.
All of our greenhouse frames are manufactured in California and engineered for long-term performance. Every model is designed with the serious grower in mind — from urban backyard gardens to licensed cannabis farms and commercial-scale food production.
Personalized Support for Every Grower
Need help figuring out which setup is best? Whether you’re launching a 10×12 backyard greenhouse like our BloomBox or building out a 30×100 commercial greenhouse, our team is ready to guide you — from your first question to your final harvest.
FOLLOW US ON INSTAGRAM @T3GREENHOUSESUPPLY