Hi everyone, I have been experimenting with growing some trees from seed. Over the past 4-5 months I have grown about 120 apple trees from seed in cups inside my apartment. I recently planted them outside and they looked fantastic when I was finished. I watered them, and the first 2-3 days it was overcast and cool. It's been 9 or 10 days now and almost all my trees have turned purple! I am new to the fruit tree game (besides planting a few peach trees last year) and have no idea what the cause of this is, or if I've done something wrong. The trees don't look dead - the leaves aren't wilted or falling off, they are literally just turning purple. Does anyone have any idea what is going on? Thanks in advance