EVERGREEN

Plant Encyclopedia

Rhododendron × obtusum

Rhododendron × obtusum (Kirishima azalea)

Japanese name: キリシマツツジ (霧島躑躅)
Scientific name: Rhododendron × obtusum

Rhododendron × obtusum

[Overview]
An evergreen shrub.
The leaves are simple and alternate, elliptic and about 2 cm long, with hairs on the margin.
Some turn red in autumn to winter.
The branch tips bear flowers in groups of 2–3, with flower color from crimson to white and 5 stamens.
There are many cultivars, including double-flowered ones.

[History]
A horticultural variety produced in Satsuma during the Edo period from azaleas growing wild in the mountains of Kirishima, Kagoshima.
It was later brought to Edo, where it became popular.

[Cultivation]
Propagate by cuttings.
It prefers sunny, well-drained, acidic soil.
Cultivation is easy.

Details

Names
English: Kirishima azalea
Japanese: キリシマツツジ(霧島躑躅)、キリシマ(霧島)、ホンキリシマ(本霧島)
Life form
Shrub
Evergreen / deciduous
Evergreen
Leaf type
Broadleaf
Habit
Terrestrial
Planting (or sowing) season
March, April, September, October
Flowering season
April, May
Growth form
Branching
Height
500–2000 mm
Leaf shape
Simple leaf (unlobed)
Leaf arrangement
Alternate
Leaf margin
Entire
Flower color
Red, Pink, White
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seedlings
Propagation
Cuttings
Sun exposure
Full sun
Water needs
Moderate
Soil needs
Required
Soil acidity
Acidic
Suitable uses
Rock garden, Bonsai, Potted plant, Hedge, Parks and gardens, Street trees, Wall greening, Container, Balcony
Diseases
Powdery mildew
Pests
Spider mites, Azalea lace bug, Rurichurenjihabachi, Benimonaoringa
Japan Flower Trade Code
21124

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

Sponsored