Proper shrub or tree pruning and shaping is a must for several reasons. It is a must to maintain the health of the plant. Pruning and shaping helps improve the quality of the flowers, foliage, fruits or stems. Shrubs shaping restrict its growth. Shaping and pruning is sometimes necessary especially with trees that grow too large or become unsightly. When properly done, pruning and shaping of shrubs can train them how to grow physically.