Converting an Outbuilding to a Greenhouse: What You Need to Know

Greenhouse Conversion: Plan for Heating, Cooling, and Reality

Turning a shed into a greenhouse sounds romantic—tropical warmth in winter, year-round harvests. But without a reliable heat source (like a gas heater), a Georgia ice storm can turn your paradise into a freezer overnight. Proper ventilation and cooling are equally critical for summer.

Key Considerations

• Structure: Ensure the frame can support glazing (polycarbonate, double-poly film, or glass).
• Heating: Calculate BTU needs for your coldest night. Gas, propane, or electric heaters with thermostats are standard.
• Cooling: Exhaust fans, shade cloth, and evaporative cooling prevent heat buildup.
• Air circulation: Horizontal airflow fans reduce disease and equalize temperature.
• Water & power: Plan for irrigation, electrical outlets, and drainage.

Low-Cost Alternative: Hoop House

A simple hoop house made from PVC pipe and 6-mil greenhouse plastic can extend your season significantly at a fraction of the cost. Add a small heater for winter protection.

Resources

Explore comprehensive greenhouse guides at UGA Extension Greenhouse Resources.