Better hobby greenhouses are equipped with automatic sensors that open vents which allow ventilation and keep the interior temperatures from getting too high. These are a great labor saver, but can get expensive. Another benefit sometimes found in nicer greenhouses is a built in irrigation or misting system. Members of the Hobby Greenhouse Association, or HGA, have invented many interesting designs of greenhouses.

If gardening is your hobby, greenhouse growing will interest you. With a greenhouse, you can have the earliest tomatoes and salad greens all year. You can also start seedlings for the main garden early in the spring when outdoor temperatures would kill them. A hobby greenhouse can be a good investment.