Preventing burned leaves on deciduous trees in the summer involves two things: 1. We need a lot of fine roots. 2. We need to water frequently. Let’s break that down a bit.
If we don’t have a lot of fine roots, it won’t matter how much we water because few roots won’t be able to support the water needs of the tree at 95 F/ 35 C. If we overwater before we have many roots, we won’t get many more to emerge. And if the tree is in a poor soil mix, we won’t get many fine roots for that reason, too.
If we do have a lot of fine roots, and yet don’t water more than once a day at 95 F/ 35 C we will likely get burned leaves on our beeches, maples and other deciduous trees anyway. On a hot sunny day be ready to water 3 times a day. If your lifestyle does not allow that, then set up a watering system for the one or two watering cycles that you can’t do by hand.
Both of those requirements must be met to prevent burned leaves. Take a look at these photos: