The pruning should have been done in mid winter, but you might just get away with it if you forgot and do it NOW. If your trees are already budding leave well alone. However there is more to be done to keep the trees in good nick.
Firstly remove grasses from a circle around the trunk’s base. A neat area of bare soil is good because when you now mulch there, the worms will do their business and get those nutrients down to the tree’s root system. Clearing the circle also allows a little more water to penetrate the soil, right where the tree needs it.
Now is also a great time to give branches a once over, looking for cankerous wood or split bark that might indicate disease. Look also for the early parasites. I found a tree had already been taken over by ants who will help aphids so a grease band needs to be applied.