I would tend to want to put them in the ground, just because of the low maintenance. I'll bet they are growing fast and may need to soon be watered every day if they are in the sun and getting root bound. Your temperatures are similar to what I often expect when I plant at the end of May. The coldest night shown is 38, the others say warmer. The danger would be if the forecast suddenly changes for an actual frost, since you probably can't trust your son to cover them properly. Like Keith, I often have lows in the 40's early in the season, so that wouldn't concern me. I suppose you could hedge your bets by planting some of them, so he has fewer to deal with?
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Dee
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