Location
Careful consideration of a proper site for your greenhouse often reveals this primary disadvantage of constructing one. A greenhouse should be placed where it captures full sun, especially in winter. The Clemson Cooperative Extension notes that areas on the east side of your property receive maximum sunlight from November to February. Deciduous trees shade greenhouse plants from intense sunlight during warm seasons, and they also allow more sun to reach plants in cool seasons after they shed their leaves. You’ll need sources for electricity and water, which add to your start-up and maintenance costs.