For the gardening enthusiast a greenhouse can be a blessing, allowing them to start the growing season earlier in the spring and extending the season until late fall. There are so many greenhouse design for gardens on the market today to choose from, you should have no problem finding the one that suits your needs the best. Whether you are looking for small solarium, medium or large greenhouse designs or even a greenhouse design that comes prefabricated to make it easy to install, you should find the perfect one for you. When choosing a greenhouse design, you should also consider weather conditions in your area when selecting a roof. For example, if you experience heavy snows during the winter, most likely you will not select a flat or straight roof design, rather a roof that will allow the snow to slide off easily.