Trees need deep root watering. So during water restrictions, when you are allowed, give them a good long drink. And then mulch, mulch, mulch, to slow evaporation and keep the ground cool.
Minimize or stop pruning or trimming to avoid scorching your shrubs.
For best results, avoid planting until the fall. Local nurseries will often agree to keep your trees or shrubs until fall if you pay for them now when you have more of a choice.
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