Gorgi I only hardened them a little moving them around for a few days I will keep an eye out for sunburn. The big trees have been out for two weeks now with no problem I just moved all the 1 gal trees out friday. I just today put a shade cloth on the greenhouse for some of my other plants that I start in there. It was getting to hot 110 degrees and the fan was not doing anything, need a bigger fan I guess.