Yes, I agree about the temperature drop. I'm talking about orchids which are IN THE HOUSE OR APT. not the greenhouse... When I know for sure it's time for an orchid to spike, ( late Fall )I put it on the window ledge and drop the insulated blind behind the plant, so that it gets about a 20 to 25 degree temp. drop at night. I also start giving it a weak ( 1/4 to 1/2 of what is written on the directions) blossom booster, weekly...I personally use 10-30-20. Works like a charm for me! Betty in Texas