If you need a midsize starter greenhouse that is powerhouse growing structure, the Essence 8' x 12' greenhouse kit is the one for you. It has 96 square feet of growing space,  two roof vent windows for  ventilation, a ramp-style threshold to accommodate wheelbarrows or wheelchairs, and  high-clearance double doors.
The Essence greenhouse kit has an aluminum frame and galvanized steel base that is resistant to rust and corrosion. The roof and the side panels of 4mm polycarbonate is virtually unbreakable.   You can choose from several foundation options based on your budget and technical know-how.
Passionate garden hobbyists can create their own year-round growing environment with a Essence greenhouse kit. They're backed by a five-year warranty and our 100% customer satisfaction guarantee. 
Essence Greenhouse 8x12 Features:
Heavy-duty aluminum frame: Corrosion-resistant aluminum frame is strong and long-lasting.
Twin-wall polycarbonate panels: Clear, 4mm UV stabilized twin-wall polycarbonate panels provide excellent heat retention and diffused light for your plants.
Improved ventilation: Two vent windows and double doors for improved airflow.
Includes preassembled split doors and a window with weather stripping.
Offers 96 square feet of growing space.