Greenhouse Types of greenhouses
 Greenhouses come in many different sizes. Some people have small greenhouses in their backyard, outside their home. Plant companies have large greenhouses. Their structures range in size from small sheds to very large buildings. They are used by people with smaller gardens, those on a budget as well as those that want to start off their seeds and seedlings in a protected environment as we as those growing things that need warmer conditions - say tomatoes or even beans.