[Image description: an image from the movie Dazed and Confused with text that reads “‘This summer is too hot’. Me: ‘Have you ever planted trees?’ ‘No.’ Me: ‘Be a lot cooler if you did’”
I agree that it’s a really difficult time for larger plants to establish and begin supporting themselves. One thing I’ve found helpful, and that I tell everyone receiving one of our plants during the season, is to water more deeply and less frequently to promote the kind of root growth that will provide better resilience during dry and/or hot periods