The answer to 'how to maintain shrub' is to regularly prune, water, and fertilize your shrubs to keep them healthy and looking their best. Pruning should be done annually in late winter or early spring to remove dead, damaged, or overgrown branches. Water shrubs deeply once a week during dry periods, and apply a balanced fertilizer in early spring to provide essential nutrients. Mulch around the base of the shrub to retain moisture and suppress weeds.
It's important to use the right pruning techniques to avoid damaging the shrub. Make clean, angled cuts just above an outward-facing bud or branch. Avoid cutting the shrub into a geometric shape, as this can stress the plant. If you're unsure about the best way to prune a particular shrub, consider consulting a professional landscaper or horticulturist.