Irene Koster Azalea
Azalea 'Irene Koster' (Occidentale hybrid)
Description | This extremely hardy selection provides a massive display of sweetly scented, funnel-shaped blooms. Buds have dark pink stripes and open to light rose-pink flowers with a showy yellow blotch with brownish orange spotting on the upper petals. Mounding form is excellent for massing in shrub borders. Deciduous. |
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Light | Full sun, Partial sun |
Watering | Keep soil moist, but not soggy. |
Blooms | Late Spring |
Mature Size | Moderate growing; reaches 6 to 8 ft. tall, 4 to 6 ft. wide. |
Deciduous/Evergreen | Deciduous |
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Special Features | North American Native Selection |
Growth Rate | Moderate |
Flower Attributes | Fragrant, Showy Flowers |
Landscape Use | Border, Container, Hedge, Privacy Screen |
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Flower Color | Pink |
Foliage Color | Green |
Companion Plants | Dogwood (Cornus); Astilbe (Astilbe); Viburnum (Viburnum); Rose Of Sharon (Hibiscus); Coral Bells (Heuchera) |
Care | Thrives in humus-rich, acidic soils with excellent drainage. Best in bright shade in hot southern zones. Shelter from drying winds. Water deeply, regularly during first growing season to establish an extensive root system; once established, maintain evenly moist soil. Keep roots cool with a layer of mulch. Feed with an acid fertilizer after bloom. |
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This Plant's Growing Zones: 5-7

Your USDA Cold Hardiness Zone:
Your climate may be too cold for this plant
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101 Market 8980 Quantrelle Ave. N.e.
Otsego, MN 55330 -
14th Street Garden Center 793 Jersey Ave.
Jersey City, NJ 07303 -
3rd Avenue Floral & Greenhouse 1110 3rd Ave. West
Dickinson, ND 58601
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Monrovia grows beautiful plants for every region
We have been pioneers and craftsmen in the art of growing plants for nearly
100 years. Since our founding in Southern California by Harry E. Rosedale, Sr.
in 1926, we have been absolutely dedicated and obsessed with quality.
We have been pioneers and craftsmen in the art of growing plants for nearly 100 years. Since our founding in Southern California by Harry E. Rosedale, Sr. in 1926, we have been absolutely dedicated and obsessed with quality.