SpringHouse Gray Shed Cover By FlowerHouse Designed to slip on top of your existing spring house greenhouse will instantly turn greenhouse into an off season storage shed or use for light deprivation to force blooms. Flower forcing is an age old technique used to coax flowers and fruiting and vegetable plants into early blooms and results. By exposing plants to maximum sunlight in the morning and then covering them with our total black out light deprivation covers in the afternoon they will act as if the winter solstice is coming which forces blooms, fruit and vegetables earlier than normal. With consistent attention to this process mature plants will produce more flowers and more yield of harvest. Flower house storage and flower forcer covers feature a large zippered door for access and make it easy to fit over spring house. Simply zip the door shut and stake down the corners if necessary and it's completely dark inside.