Dwarf Rhododendron, Yak Rhododendron 'Ken Janeck'

Rhododendron degronianum subsp. yakushimanum

Family: Ericaceae (er-ek-AY-see-ee) (Info)
Genus: Rhododendron (roh-do-DEN-dron) (Info)
Species: degronianum subsp. yakushimanum
Cultivar: Ken Janeck
Hybridized by Janeck
» View all varieties of Azaleas and Rhododendrons




36-48 in. (90-120 cm)


4-6 ft. (1.2-1.8 m)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Light Shade


Unknown - Tell us

Bloom Color:

Pale Pink



Bloom Time:

Late Spring/Early Summer



Other details:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

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:

East Haddam, Connecticut

Ellicott City, Maryland

Newton Highlands, Massachusetts

Roslindale, Massachusetts

Uxbridge, Massachusetts

Califon, New Jersey

Lititz, Pennsylvania

Concrete, Washington

Sequim, Washington

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Gardeners' Notes:


On May 14, 2014, Sequoiadendron4 from Lititz, PA (Zone 6b) wrote:

Hardy little Rhodi for sure. We had temps down to -5 this winter with wind and it's site is somewhat exposed. No burnt out blooms and no brown leaves. It's blooming now and looks great. As the blooms age, it does lose some of that pink edging. New leaves are covered with white fuzz that feels cool. Very compact and only grows a couple inches a year.


On May 12, 2014, coriaceous from ROSLINDALE, MA wrote:

In addition to the beautiful flowers, this rhododendron is one of the few that are suitable for growing in a foundation planting---because growth is slow enough that it won't quickly cover a window.

Like all yak rhodies, the new foliage has a fuzzy brown coating (indumentum) which many find ornamental, though some wonder with alarm if it's a sign of fungal disease.


On May 11, 2014, bobbieberecz from Concrete, WA wrote:

This is an incredibly beautiful rhodie. I inherited it with the house we bought and found it bug-eaten, unwatered in a totally neglected part of the garden. All but 2 side branches were gone. I cleaned out the garden and treated the 2 straggly branches. No new branches have emerged in the 8 years we've been here but the blossoms keep increasing each year. I keep this poor bush because I can't part with those beautiful blooms that resemble a water color painting. I'm on the search this year for another bush that I can give a fighting chance. I admire this plant's will to live.


On May 4, 2007, kizilod from Uxbridge, MA wrote:

Slow grower (about 4" per year). Vivid pink blossoms open as flowers with pink exteriors and white interiors. Eventually, the entire blossom fades to pure white.