Many times shrubs that are shaped in July and August will surprise you with a light covering of flowers. My Emerald Snow Loropetalum is a great example (see images). While not all evergreen flowering shrubs will do this, many will, and this does not diminish their normal flowering time. Also, crepe myrtle, when you tip prune the spent flowers, will do the same. I have also seen yellow jessamine do this, but on a fall flower show if long runners are pruned. And finally, saucer magnolias will surprise you with an occasional fall bloom. With so much rain in the last few days, who knows what we might have producing flowers this fall.