Greenhouse Types: Seasonal

Season Extension Greenhouses

Season Extension GreenhousesNon-thermal Aluminum with Monolithic Glazing

This system is ideal for spring and fall gardening, when heating and cooling are not a concern. A non-thermal greenhouse is suitable for a hobby gardener who uses the structure primarily to extend the start or end of the growing season four to eight weeks, depending on location. Gardeners can start seeds in the greenhouse during spring (grow lights can be supplied by Solar) and transplant the seedlings outdoors after the “frost free” date passes. Fall bulbs such as tulips and daffodils can be forced into early blooms in these structures. The greenhouse can overwinter dormant plants during their off seasons. Solar Innovations, Inc. offers earth anchors and aluminum sill frames to secure small greenhouses. A foundation may not be required if the greenhouse is less than 200 square feet. Please check your local code.

Three Season Greenhouses

Three Season GreenhousesNon-thermal Aluminum with Insulated Glazing

This greenhouse system provides more insulation and a longer growing season than the Season Extension style greenhouse. Seeds can be started in early spring to later transplant in an outdoor garden. The greenhouse usually remains dormant during the summer because there is no cooling system. You can start cool weather crops such as kale and lettuce in the fall that can be harvested throughout the winter. It can also be used to overwinter tender plants and bulbs. There is typically no heating system in the greenhouse, but the insulated glazing will retain passive solar heat from the sun. This alone can provide sufficient temperatures for hardy plants in most locations. Temperatures are controlled by ventilation using doors, windows, and ridge vents.

Four Season/Year Round Growing Greenhouses

Year Round Growing GreenhousesThermally Enhanced Aluminum and Insulated Glazing

This greenhouse is used for growing plants year round and is suitable for extreme heat or cold. Energy efficiency is greatly improved and allows temperature, humidity, and lighting to be properly controlled. These greenhouses can sustain vegetation through a heat wave or snowstorm. Using the correct accessories will allow any plant to grow in this greenhouse, including bedding plants, orchids, and citrus trees. Outside temperatures and precipitation have little effect on plants in this environment. Fruits and vegetables can be nurtured from seeds, planted in raised beds, and harvested in the midst of a blizzard.