Bloom-A-Thon® Lavender Azalea

Rhododendron 'RLH1-4P19'

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Bloom-A-Thon Lavender Azalea (Rhododendron 'RLH1-4P19') at Wallitsch Garden Center

Bloom-A-Thon® Lavender Azalea flowers

Bloom-A-Thon® Lavender Azalea flowers

(Photo courtesy of NetPS Plant Finder)

Height:  4 feet

Spread:  4 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  6

Group/Class:  Bloom-A -Thon Series

Brand:  Proven Winners


Vibrant clusters of lavender blooms cover this azalea in mid-spring, then continuous flushes in summer and fall; blooms even in mid-summer heat; great for borders, or foundations; needs highly acidic and organic soil that is well drained

Ornamental Features

Bloom-A-Thon® Lavender Azalea is covered in stunning clusters of lavender trumpet-shaped flowers at the ends of the branches from mid spring to early fall. It has green foliage which emerges light green in spring. The glossy narrow leaves remain green throughout the winter. The fruit is not ornamentally significant.

Landscape Attributes

Bloom-A-Thon® Lavender Azalea is an open multi-stemmed evergreen shrub with an upright spreading habit of growth. 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.

Bloom-A-Thon® Lavender Azalea is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Bloom-A-Thon® Lavender Azalea will grow to be about 4 feet tall at maturity, with a spread of 4 feet. It tends to be a little leggy, with a typical clearance of 1 foot from the ground. 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 full sun to partial shade. It requires an evenly moist well-drained soil for optimal growth, but will die in standing water. 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 leaves 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 particular variety is an interspecific hybrid.

Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Accent  Massing  Garden 
Flowers  Winter Value 
Ornamental Features

Disclaimer - This Plant Finder tool is an online resource representing many of the varieties that we carry over the course of the season, and is intended for informational purposes only. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact the store directly for availability. Additionally, the Plant Finder tool does not include our entire inventory of plants, so be sure to visit our store to see varieties that may not be represented on this list.