Rhododendron × obtusum
Japanese azalea
At a glance
- Light
- Partial shade
- Pot size
- from 15 l
- Lifespan
- Perennial
- Flowering
- Apr–Jun
- Hardiness
- Hardy with protection
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Description
The Japanese azalea is a compact, evergreen to semi‑evergreen ornamental shrub that bursts into a spectacular display of flowers in red, pink, violet, or white in spring. It is well suited for use as a border plant, in heath gardens, or as a container plant for terraces and balconies. Popular cultivars include ‘Rubinstern’ (deep red), ‘Adonis’ (pure white), and ‘Diamant Lilapurpur’ (bright purple). Even in winter, its glossy dark green foliage adds interest to the garden.
Care instructions
Plant in a semi‑shaded, wind‑protected spot in humus‑rich, well‑drained, acidic soil (pH 4.5 to 5.5). It thrives best under light trees. Water evenly with low‑alkalinity water, especially during flowering, and avoid standing water. Prune after flowering if necessary to protect next year’s growth. Protect young plants and container azaleas from frost by covering with fleece or mulch around the root ball.
Garden year
FloweringApr–Jun
Soil & site
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