The best time to trim and prune many shrubs and trees is in the late winter or early spring, before they start to grow. Pruning includes shaping, thinning out and illuminating deadwood or infected branches. Regular pruning can help keep plants, trees and shrubs healthy for years to come. Plants vary in maintenance and pruning requirements. Some plant varietals require shaping, training regrowth, copying and pollarding pruning methods. After plants have been pruned, and right technique applied, it can assist in the growth of strong roots, ensuring resilience against harsh climate conditions. Trimming or tree pruning can also help improve growth and development.