In early summer, prune spring-flowering trees that flower on old wood, so that there is plenty of light to ripen the growths made during the summer. Deciduous trees such as horse chestnuts (Aesculus), birches (Betula), cherries (Prunus) and maples (Acer) that 'bleed' heavily should be pruned in mid-summer after new growth has matured. Prune mature, pleached trees in mid-summer and young, pleached trees in late summer. Remove diseased or dead branches from evergreens and clip topiary as necessary.

Container-grown trees may be planted during any part of summer, as long as conditions are not too hot or dry. Water, feed and mulch newly planted trees well.

Propagation may be carried out by chip-budding in mid-summer or semi-ripe cuttings in late summer.