Betty, never a bother... you know how much we all get that little ego boost when others ask questions.... Anyway, yes is the short answer. If I didn't heat the greenhouse I wouldn't have plants to spike! I go out every morning about 7AM and kick it up to about 72F+/-. On sunny or partial sunny days I'll get up to 85F+. At night I reduce the temp to about 60F+/-. None of this is exact and parts of the greenhouse are cooler than other areas just because.