PVC greenhouses provide great protection from the frost, enabling the gardener to start seeds and seedlings early to establish the plants and gain a jump on spring; even extending the growing season well into fall and winter, assuring a more bountiful crop. The greenhouse frames snap together effortlessly and each corner locates into the top of the corner joint stake. Carefully place the PVC greenhouse covers over the frames and secure each corner to the raised garden bed with the string tabs. Both sides have zip up windows for easy all around access and ties to hold them open for free air flow. Erect at the first hint of spring to seed early and provide protection from adverse weather to your young plants. The greenhouse can be easily lifted off the raised garden bed and stored in the hot summer months, then replaced in fall extending the season into the winter. Simple to extend to 4' x 8' or longer by adding PVC Greenhouse Extension Kits.