Hello,
Whats the daytime temperatures there? This looks very much like the symptoms of either heat stress, and overwatering....how well is the inground soil draining? Did you mox in some sort of aeration? Pumice, coco, perlite?
I think it may have gotten a big shock when it went in ground, amongst other possible things. If you are spraying, definitely do that at night. And possibly reduce the nutrients as well...any chance you know if your ground soil is nutrient rich or not? In the diary it showed fairly high nutrient #s, was that prior to transplant or since they've been in ground?
Try letting soil dry out and then the next water either just plain water, and then next maybe a small dose of kelp extract and silica. If high heat, also try to provide some cooling.
Good luck friend.