12x20 Polycarbonate Greenhouse Kit

Grow year-round in the Pacific Northwest with a 12x20 Full Polycarbonate Greenhouse Kit, professionally installed and ready to use. Perfect for small properties, backyards, homesteads, and urban lots where space matters but durability is critical. Built by Northern Garden Supply, this greenhouse is designed specifically for wet weather, wind, and cool PNW conditions. Features: Heavy-Duty Frame: 14-gauge American-made square steel tubing — built to last for decades All-Season Coverage: 8mil twin-wall polycarbonate for superior insulation & light diffusion Smart Use of Space: Expanded metal shelving runs the full length on both sides Secure Access: 4’ x 7’ locking door Climate Control Options: Passive ventilation included Optional upgrades: thermostatic fans & heaters for precise control Perfect For: Backyard gardeners & hobby growers Small-footprint properties Homesteads & urban agriculture Growing fresh produce all year long Price includes professional setup Built tough for the Pacific Northwest Compact size with maximum growing space We welcome Questions! Give us a call! Happy to help you decide if this greenhouse is the right fit for your property. Northern Garden Supply – Built Local. Built Strong. Built to Grow.