Extend your growing season by keeping your VegTrug™ plantings frost- and wind-free in early spring and late fall. Then, when it gets warmer, unzip and roll up the greenhouse panels to reveal a mesh bug barrier. This cover and frame set work with the VegTrug™ Patio Garden, sold separately. Sturdy steel frame slips into channels sewn into the cover, and fits snugly inside your trough planter box. Zippered panels roll up and tie back when you need to tend your plants or harvest veggies. Ventilation on ends and sides ensures that your plants never overheat.