Korean Rhododendron

Rhododendron mucronulatum

Family: Ericaceae (er-ek-AY-see-ee) (Info)
Genus: Rhododendron (roh-do-DEN-dron) (Info)
Species: mucronulatum (mu-kron-yoo-LAY-tum) (Info)
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4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)


36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade


Parts of plant are poisonous if ingested

Bloom Color:


Magenta (Pink-Purple)

Bloom Time:

Mid Spring



Good Fall Color

Other details:

Unknown - Tell us

Patent Information:


Seed Collecting:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Baltimore, Maryland

Lexington, Massachusetts

Wayland, Massachusetts

Winchester, Massachusetts

Hudson, New Hampshire

Murrysville, Pennsylvania

Port Angeles, Washington

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Gardeners' Notes:


On Apr 20, 2015, coriaceous from ROSLINDALE, MA wrote:

A deciduous rhododendron, especially useful because of its exceptional winter hardiness and its exceptionally early season of bloom.

It adds color to the landscape in spring when the forsythias are in bloom. Its flower color is a lavender-pink or pinkish lavender (or white), not a harsh magenta. Lovely when in bloom, it fades into the background afterwards.


On Jan 13, 2014, SoooSirius from Municipality of Murrysville, PA wrote:

These rhododendrons bloom very early in my yard; usually in late March and are harbingers of spring. The plants I have, which I grew from 1 seed pod about 20 years ago, are quite variable in color and form. They range from white to magenta, and various shades of pink. I have some that are barely a foot tall and some that are topping 7 ft. In general they are an open, airy shrub. I find them generally quite hardy in my zone 5b, although if the buds are showing color a hard freeze can turn them to little blobs of brown. Deer do nibble the buds sometimes. They can be pruned after blooming, and can even be forced to bloom indoors. Since they bloom before the leaves appear, in the landscape especially against a fence or evergreens, they give the impression of bits of tissue paper that float on ... read more