Mini- Greenhouse Heating Help?

Question

Can someone recommend a good (safe) way to heat a mini-greenhouse. It really is not large enough to accomodate a regular small space heater or sun lamp without risk of melting the cover. It's 66"x40"x19". I should probably also mention it is on a wood deck. Thank You!

Answer 1

Sure, regular light bulbs.
Did you know that you can cook with them if you have an aluminum foil lined box?

Answer 2

try composting in it, i know that generates heat and with the small size it may just work( and/or smell a little) also maybe excercise in the room ? i dunno