Sigma DIY Greenhouse Kit 10 x 26 ft. with 6mm Double-Wall Polycarbonate Panels and Galvanized Steel Frame

The Planta Sigma 26 (Gen III) is a heavy-duty greenhouse designed for spacious, comfortable growing throughout the seasons. Ideal for cultivating fruits, vegetables, and flowers, it combines durable construction, enhanced weather resistance, and upgraded features to create a dependable backyard growing environment.

With a 7-foot roof height and excellent end-to-end ventilation, the Sigma 26 provides a comfortable space for planting, tending, and harvesting crops. Its rust-resistant galvanized steel frame and 6 mm twin-wall polycarbonate panels offer lasting strength, insulation, and protection from the elements. New aluminum polycarbonate trim securely holds panels along the greenhouse arches for added durability and weather resistance. The distinctive arched design helps shed wind, rain, and snow, with wind resistance up to 65 mph and an improved snow load capacity of 55 psf (approximately 4.5 feet of snow) when properly installed and anchored.

New insulated doors at both ends help minimize heat loss and drafts, while upgraded handles provide smooth operation and easy access. A new window/door latch allows the upper window and lower door sections to open together for added convenience and ventilation. The extendable design accommodates future expansion beyond 100 feet, making it a versatile solution for growing needs. Backed by a 10-year warranty, the Sigma 26 delivers dependable performance for years to come.

Snow Load Weight of 55 psf (265 kg / m²)

Equal to 4.5 feet fresh snow layer and is maintenance free in the winter

Wind Resistant

Up to 65 mph (100 km/h)

Extendable & Customizable

This greenhouse can be extended with additional expansion kits (call to order)