Help protect your plants and extend your growing season with the FlowerHouse 9 ft. D x 9 ft. W Pop-Up FarmHouse Greenhouse. Constructed with Gro-Tec rip-stop protection, this durable greenhouse is UV protected to provide long performance life. The greenhouse's 12 screened vent openings create great air circulation, while closing the vents promotes and helps maintain the high humidity levels desirable for an ideal growing environment.