Hortitech greenhouse frames in 20'x20' are built for resilience and are competitively priced. These small greenhouses are made from high-grade galvanized steel that can withstand wind and snow. When you buy greenhouse frames from Hortitech, you get greenhouse frames direct from the manufacturer that are 100% American-made with no cheap pre-fabricated foreign parts.

This product is ONLY the steel greenhouse frame.

All steel, purlin, and hardware for body of frame. 

20'x20' Semi-Gable greenhouse frames have taller sidewalls that reach a higher peak than the Quonset greenhouse frame type. The high pitch allows for better snow shedding and provides the largest interior volume of space per square foot. Semi-Gable greenhouse frames provide easy access, the most usable growing space, and can withstand snow.

Semi-Gable Greenhouse Frame Features

• Largest interior volume per sq foot
• Most usable grow space
• Highest peak height
• Good ease of access

This galvanized steel greenhouse frame is heavier to ship but will outlast aluminum greenhouse frame parts that can easily bend and buckle. 20-foot greenhouses with 20-foot length provide a 400 sqft greenhouse space. You can purchase this greenhouse frame only or check out our greenhouse kits that will include more complete greenhouse options.