I have taken a look at all of the curled leaves threads and I am having a problem identifying the issue I have. It is an outdoor grow. The plants have been in the containers since April 22. I grow in these containers every year. The plants are now about 2.5 ft tall and were doing well until about 10 days ago. They developed curling and some brown areas. We did have some very hot days (low 90's) in that timeframe so maybe it is heat stress? I would appreciate any guidance anyone has. Thanks.