There are a few common myths about painting a greenhouse black. Most come from understandable concerns, but they’re not quite accurate: Myth 1: It will get too hot and cook plants Reality: Temperature is far more affected by ventilation, glazing, and airflow than frame colour. A black frame may absorb more heat, but it won’t overheat a well-ventilated greenhouse. Myth 2: Black blocks too much light Reality: The glass (or polycarbonate) controls light, not the frame colour. A dark frame actually