The GrowIT Greenhouse-in-a-Box® with Easy-Flow™ roll-up side vents delivers quality construction, quick and easy assembly, and best-in-class value. Ready to build out of the box, the GrowIT Greenhouse-in-a-Box® with Easy-Flow™ features a powder-coated 1-3/8 in. steel frame with ShelterLock steel stabilizers for added strength and durability. The translucent, ripstop cover is waterproof and UV-treated, providing enhanced illumination -- for plant growth and protection. Easy Slide cross rails ensure a snug cover fit while Ratchet Tite tensioning provides solid cover anchoring to the frame. Easy-Flow™ side panels and zippered half-moon end-panel vents provide airflow and temperature control.