Summer can be stressful for trees and shrubs due to the heat and possible droughts. Make sure you are watching them diligently for signs of trouble.
Summer is the hottest and driest of the seasons. You will need to watch your trees and shrubs more carefully. Keep an eye out for wilting. You may want to set up a watering system to help keep them watered enough.
In early summer, you can fertilize if needed (test your soil if you notice stunted growth, discolored or dead leaves, or wilting). It would be best to take care when using nitrogen fertilizers in late summer as they will promote new growth, which may become damaged in winter.
Focus more on simply removing dead, diseased, or damaged branches. Many trees and shrubs are more prone to diseases if pruned in late spring or summer.
We have put together some information and guidelines you can use to successfully take care of your newly planted shrubs and trees as they begin to get established in their new surroundings. The advice is a starting point, and you are an essential part.