Rhododendrons and azaleas, both from the genus Rhododendron, have long been mainstays of late spring because of its spectacular clusters of showy blooms and large green leaves that often last through winter.


The flowers are usually tubular-, funnel-, or bell-shaped and often fragrant. The leaves for the smaller azalea are usually pointed and narrow; the leaves of the rhododendron are generally large and leathery.


This shrub generally performs best if they are provided with moisture and shelter under trees. They prefer climates with adequate rainfall and moist summers. The two main azalea groups, evergreen and deciduous (varieties that drop their leave in the fall) can be found in nearly ever part of North America, from the frosty Canadian plains to tropical Florida. The rhododendron types are fussier, preferring environments where it is neither too hot nor too cold.



They need a certain amount of chilling to develop strong flower buds.


With thousands of varieties, there are rhododendrons and azaleas for just about every landscape situation. There are low-growing ground cover azaleas as well as plants that can grow up to 25 feet tall. Though most plants flower in the spring, there are also summer-blooming varieties that add color and charm to the garden.
 

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