With the recent spell of sun and wind, I have now moved my maples in to the sheltered part of the garden, where they get dappled shade and protection from the drying wind.
Most of my trees need watering daily now. The only exceptions to this are the Beeches, which have only just started to leaf out and the Pines which are more happy to have the soil on the dry side.
I am keeping a close eye on my Hornbeams this year, as I had a lot of leaf scorch on them last year after potting them in molar clay based cat litter. They will need watering morning and evening when it gets really warm.