Deciduous azaleas and evergreen plant azaleas generally dwell near or under trees ; they are two of the eight types of the genus Rhododendron . All 17 species of azaleas native to North America are deciduous ; they omit their leaves in the fall and are dormant in the wintertime . Their heyday bloom scarlet , orangish , pinkish purple , yellow and white . Growing zones for azalea reckon on the miscellanea .

Deciduous Azaleas

aboriginal azalea generally develop ripe in the climates in which they naturally develop . Most metal money of azaleas native to North America develop the southeast U.S. and will grow well in USDA Plant Hardiness Zones 6 to 8 . They can survive minimal temperatures of -10 to 20 degree Fahrenheit .

Evergreen Azaleas

Most evergreen species are native to Asia ; they do not go dormant to protect them from stark cold wintertime and grow best in more temperate to warm climates . They produce blossom in the same coloring as North American azaleas but do not yield yellow blooming .

Rainy Climate

The western azalea ( Rhododendron occidental ) is the azalea best suited for the rainy mood of Northern California , the Pacific Northwest and British Columbia . It yields pale pinkish or creamy white blossom , and its leaves turn cherry or icteric before they drop in the fall . Rhododendron occidental is difficult to grow outside of this area .

Cold Weather Zones

Most native azalea grow well in the southeastern or southern Midwest , but three specie do well in USDA Zones 4 and 5 in the northerly U.S. body politic and Canada where winter temperature drop as scurvy as -20 degrees Fahrenheit . The roseshell azalea ( Rhodendron prinophyllum ) is a moth-eaten - hardy native to wooded areas from southeastern Canada to Virginia and west to Missouri . It grow clove - scented flowers that are sometimes livid but usually pinkish or purplish pink . This azalea is often combined with other varieties to produce cold - hardy loan-blend . The rhodora azalea , ( Rhododendron canadense ) is native to swamps and rain cats and dogs bank in Canada south to Pennsylvania . It is very dusty unfearing but does n’t do well in hot , dry summers . The Pinxterbloom azalea ( R. periclymenoids ) range from Vermont to Alabama and west to Ohio and Tennessee .

Hybrid Cold-Hardy Azaleas

The University of Minnesota modernise Northern Lights , a cross between R. prinophyllum and Rhodendron x kosteranum . Over the year numerous dusty hardy variety have been developed from Northern Lights . These generally do well in area with cold wintertime . More than 10,000 different cultivar are said to have been break , with new I come along regularly . Some of these produce blossoms of a special colour ; others have been hybridized to furnish azaleas that withstand winter cold and summertime heat . commercial-grade hybrids commonly let in growing zone information on the recording label .

References

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