Raised Planter Boxes with Polycarbonate Greenhouse, Wooden Cold Frame Greenhouse, Raised Garden Bed, GrayDual Use: This raised garden bed comes with a cover system. You can use the portable greenhouse cover alone or combined with the bed, adapting as needed. They're great for growing vegetables, fruit, herbs, and flowers. Ventilation: The openable roof of the cold frame greenhouse can let fresh air in to keep plants comfortable via ventilation. The pointed top helps prevent water accumulation. Protection: Use your wooden greenhouse to extend the growing