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Japanese Azalea

Rhododendron japonicum

 

 
Japanese Azalea (Rhododendron japonicum) at A Very Successful Garden Center

Japanese Azalea flowers

Japanese Azalea flowers

(Photo courtesy of NetPS Plant Finder)

Height:  6 feet

Spread:  6 feet

Sunlight:  partial shade 

Hardiness Zone:  4

Description:

Clusters of subtle apricot blooms with gray blotches cover this azalea in early to mid spring; a compact upright shrub that is great along borders; needs highly acidic and organic soil that is well drained

Ornamental Features

Japanese Azalea is bathed in stunning clusters of lightly-scented yellow trumpet-shaped flowers with harvest gold overtones and a gray blotch at the ends of the branches from early to mid spring before the leaves. It has green deciduous foliage. The small oval leaves turn an outstanding yellow in the fall.

Landscape Attributes

Japanese Azalea is an open multi-stemmed deciduous shrub with a more or less rounded form. Its relatively coarse texture can be used to stand it apart from other landscape plants with finer foliage.

This is a relatively low maintenance shrub, and should only be pruned after flowering to avoid removing any of the current season's flowers. It has no significant negative characteristics.

Japanese Azalea is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Japanese Azalea will grow to be about 6 feet tall at maturity, with a spread of 6 feet. It tends to be a little leggy, with a typical clearance of 1 foot from the ground, and is suitable for planting under power lines. It grows at a slow rate, and under ideal conditions can be expected to live for 40 years or more.

This shrub does best in a location that gets morning sunlight but is shaded from the hot afternoon sun, although it will also grow in partial shade. Keep it away from hot, dry locations that receive direct afternoon sun or which get reflected sunlight, such as against the south side of a white wall. It requires an evenly moist well-drained soil for optimal growth, but will die in standing water. It may require supplemental watering during periods of drought or extended heat. It is very fussy about its soil conditions and must have rich, acidic soils to ensure success, and is subject to chlorosis (yellowing) of the foliage in alkaline soils. It is somewhat tolerant of urban pollution, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This species is not originally from North America.

 
 
Hardiness Zone  Plant Height  Minimum Sunlight  Soil pH Preference 
Characteristics
Accent  Massing  Garden 
Applications
Flowers  Fall Color  Winter Value 
Features & Attributes

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