Hello all...new to the forum here and I need advice.

I live in CHarleston, SC and I just finally put up a greenhouse. I have all of my plants in there now but a lot of my orchids are turning yellow and dropping leaves.

My question is this.

I am heating the greenhouse with an unvented lp gas heater. Could this be the problem. I though they only gave off co2 and water vapor...

Also, the main ones dropping leaves ate the cats....they did get a coupld of cold nights (i.e. upper 30's) before I gotr the greenhouse up....could this be the cause of the leaf drop.

Right now I am at just a wait and see as far as their survival goes.

Any advice would be greatly appreciated.

Thanks to all!

Mikey