Reasons to Prune Your Plants:
It is the pruning that allows the plants to be healthy and alive. Otherwise, in the absence of pruning, plants, such as in old apple orchards and vineyards, may be very tall and untidy, which slows down flowering and fruiting. Pruning encourages vigorous new growth with brighter flowers, larger leaves, and more abundant fruits and seeds. Light pruning, such as would be given to a hedge, generates modest healthy growth; hard pruning, cutting a shrub down to a few centimeters above ground can stimulate vigorous regrowth. Hazel and buddleja respond particularly well to regular hard pruning. Not all plants respond so well to pruning, so it's important to know your plant before you start snipping with your secateurs or shears. Read more about Ultimate Guide on How to Prune Shrubs.
This also shapes plants for aesthetic purposes in topiary, bonsai, hedges, standard roses, espalier fruit trees, and pleached limes. These plants require frequent pruning to keep them in neat shapes. Nature will always try to revert them into their wild forms but through the ages. Many plants are naturally of beautiful shape, requiring little intervention, such as Japanese maples and conifers. Read more about How To Plant, Prune, and Fertilize Cypress Trees.