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Tree Guide

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Pink Azaleas Mollis HybridRhododendron x kosteranum

  • Pink Azaleas Mollis Hybrid - Rhododendron x kosteranum bush
  • Pink Azalea Mollis Hybrid Closeup

Originally developed in Belgium and Holland, the beautiful Mollis hybrid azaleas have been hybridized to be cold-hardy down to -10 degrees. These lush, deciduous shrubs bear spectacular clusters of pink flowers to brighten your home each spring and also provide beautiful fall color.

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Hardiness Zones

The pink azaleas mollis hybrid can be expected to grow in Hardiness Zones 5–8. View Map

Tree Type

This is a flowering shrub, typically planted for its profusion of spring flowers.

Mature Size

Pink Mollis hybrid azaleas grow to a height of 4–6' and a spread of around 4' at maturity.

Growth Speed Slow Growth Rate

This shrub grows at a slow rate, with height increases of less than 12" per year.

Sun Preference

Full sun and partial shade are best for this shrub, meaning it prefers a minimum of 4 hours of direct, unfiltered sunlight each day.

Soil Preference

Pink Mollis hybrid azaleas grow in acidic, loamy, moist, rich, sandy, silty loam and well-drained soils.

Attributes

This shrub:
  • Provides beautiful fall color, with the vibrant green leaves turning multicolored as the season changes.
  • Grows in a rounded shape.
  • Produces large clusters of vibrant pink blossoms.

History/Lore

Mollis hybrid azaleas originated in Holland and Belgium in the 1870s.