I think you're in the right place to get an answer. Some experts on this forum. I'm not one, but I have a couple of semps that do what is showing in your photo during the summer. They've done it for two summers now and one is showing the same symptoms now that it has gotten hot. Those two have recovered nicely in the fall and look great and full again from then until it gets hot. I also have a couple that haven't ever done it. I thought they would die the first year, but they didn't. I don't water the semps much and the summers here get really hot so I tend to not give them any. We are having some more rain currently and I finally moved some semps out of the rain. It will get steamy now, so I hope they didn't get so much they croak. It's not usual weather for my part of Texas.
