A natural hedge makes a lovely border around your property or a section of your property but a flowering hedge is even more attractive.
Flowers are always a good thing in the landscape. They feed pollinators and attract insects which are an essential part of nature's life cycle. Shrubs are specially good because they tend to be dense and provide protection for birds and small animals. Many varieties have thorns so consider this when selecting your variety.
Some of these flowering hedges also produce berries which provide food in the late season and winter for birds and other animals.
Some of the hollies make great hedges although there flowers are almost unnoticeable. They're easy to maintain and drop tolerant.
The mountain laurel is a broadleaf evergreen with beautiful pink and white flowers. You cannot trim laurels into a hedge shape because you will cut off all the new growth and they do not do well. They will look very bare afterwards.
Some deciduous shrubs that are used in hedges are rows of Sharon and forsythia. If you don't mind a bear hedge in the winter time than these can be very dense and effective as a hedge. Forsythia only blooms in the spring whereas Rose of Sharon bloom over a few months.