The answer to 'how to care for hedge' is to regularly prune and maintain your hedge to keep it looking its best. This includes trimming the hedge to the desired shape and size, removing any dead or damaged branches, and fertilizing the hedge to promote healthy growth.
It's generally recommended to trim your hedge 2-3 times per year, in the spring, summer, and fall. Use sharp, clean pruning shears or a hedge trimmer to make clean cuts and avoid damaging the plant. Be sure to remove any trimmings or debris from the area when you're done. Fertilize the hedge in early spring with a balanced, slow-release fertilizer to give it a nutrient boost for the growing season.