Mine all wilt in the heat of the day, but they perk up as the temperature cools in evening. Not sure what is causing leaf curl. Could be a lack of some nutrient or the dreaded broadmites. I am sending a link to your treemail that might be helpful. If you're worried, just toss them. Better to be safe than sorry. I haven't had curled leaves to deal with, so can't answer that one.
I am waiting for the spider mites to show up next month, if not sooner. I usually get a couple of brugs that start to droop and I see the webbing. Most of mine are in pots so I can treat them individually. I hope someone else will be able to help you like
@gone2seed
