Rhododendron yakushimanum | Also known as: Rhododendron degronianum subsp. yakushimanum | Rating: 1 votes | Print / Pdf

Although Rhododendron yakushimanum sounds like a recipe from a Japanese cook book, it is not to be eaten.

Rhododendron yakushimanum is a great rhododendron. It has the large showy flowers typical of a rhododendron, but it is a small size making it ideal for growing in a container or in a small garden. It was introduced to the UK from Japan in the 1930's. A small variety was created by Percy Wiseman in the 50s who saw the need for smaller plants for smaller gardens, so he crossed the yakushimanum with hardy hybrids. It's an everygreen shrub with dark green leaves and frilled pink trumpet shaped flowers with green speckles that grow in trusses. As the flowers age they turn white. This is a rhododendron that's actually shade tolerant. Great for brightening up a dark area of the garden.

Rate it:
Known dangers?
  • no
Height [m]
  • 1
Spread [m]
  • 1
Dominant flower colour
  • Pink
Flower Fragrance
  • No, neutral please
Flowering seasons
  • Mid spring
  • Late spring
  • Early summer
Foliage in spring
  • Brown or bronze
Foliage in summer
  • Green
Foliage in Autumn
  • Green
Foliage in winter
  • Green
Propagation methods
  • semi-ripe cuttings
  • grafting
  • layering
Growth habit
  • Domed
  • Acidic
Hardiness zone
  • Z5-9
Heat zone
  • H9-5
Winter temperatures [°C]
  • -29 - -1
Heat days
  • 30 - 150
  • well-drained
  • well-drained but frequently watered
Soil type
  • sandy
  • Clay
  • loams
Sun requirements
  • Full sun
  • Partial shade
  • Sheltered
Standard category
  • Trees & shrubs
  • Shrubs
Grown for
  • Attractive Flowers
Creative category
  • For Beginners
  • Colours
  • For every season
Gardening expertise
  • beginner
Time to reach full size
  • up to 20 years
18 Related plants


PLANTS Rhododendron

The name Rhododendron comes from the Greek for rose tree, although it isn't a rose it has a similar look. It's a large genus, there are more than a thousand species of rhododendron and nearly all of them have large and impressive flowers. There are various sized rhododendron species , from shrubs to large trees. The largest has been recorded at 98 feet tall! The flowers are usually quite showy, with lots of petals and there are many colours, from white to orange or red. They can be susceptible to pests, especially caterpillars. They prefer acidic well-drained soil. Rhododendrons are toxic, they can be harmful to cattle and people have even been known to become ill after eating honey made by bees collecting nectar from rhododendrons.