Admire blooming trees and shrubs. May is bloom time for southern magnolia (Magnolia grandiflora). These flowers give so much, and we need to do so little for them in return. I like to pluck a magnolia bloom and float it in a bowl of water near where I read or enjoy the garden at the end of the day. It lasts but a day, but what a day it is.The Endless Summer hydrangea is the first hydrangea to bloom on old and new growth, with the ability to rebloom all summer long. I planted my Endless Summer in 2005. To encourage reblooming, cut the blooms for drying or to put in vases for a fresh arrangement. This will also encourage the plant to set new buds.Prune rhododendrons and azaleas right after flowering.