Spiraea bumalda
Spiraea bumalda · Rosaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around spiraea bumalda and prepare for winter.
ID card
- Family
- Rosaceae
- Type
- Deciduous shrub
- Adult height
- Approximately 1.5 m
- Flowering
- May to August, pink to red flowers in corymbs
- Foliage
- Deciduous, tender green turning yellow-orange in autumn
- Exposure
- Full sun
- Hardiness
- Very hardy, tolerates down to -20 °C
- Origin
- Northeast Asia (Japan, Korea, China)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Spiraea bumalda flowers for a long time if you remove spent blooms as they fade starting in June. It's one of the rare spiraeas that really demands this.
The common mistake
Leaving flowers turn into fruits exhausts the plant and stops flowering by August.
The pro's trick
A light pruning in February to 30-40 cm restores a compact shape and improves the density of summer blooming.
Care
Exposure and light
Bumalda spirea thrives in full sun, which promotes generous flowering and more intense autumn color. It tolerates partial shade but flowering will be less abundant. Place it in an open space to optimize its development.
Watering
Water regularly during the first year after planting to establish the plant well. Once established, spirea tolerates moderate dry periods. During prolonged heat, keep the soil slightly moist without excess water. Avoid winter waterlogging.
Soil and drainage
Spirea adapts to most soils but prefers fertile, well-drained soil that is slightly acidic. Adding compost at planting time improves growth. Ensure water doesn't accumulate at the base, especially in winter.
Pruning and maintenance
Prune in late winter or early spring to maintain a compact shape and promote branching. Remove dead or poorly positioned branches. Light pruning after flowering extends the flowering period. Avoid severe pruning that would reduce annual flowering.
Fertilization
An application of compost or balanced fertilizer in spring is generally sufficient. In poor soil, supplement with flowering plant fertilizer at the start of the season. Avoid excess nitrogen which would favor foliage at the expense of flowers.
Diseases and pests
Bumalda spirea is robust and rarely affected by diseases. In case of excessive moisture, watch for powdery mildew. Aphids may sometimes appear in spring but rarely cause significant damage. Good air circulation limits these problems.
Did you know?
Bumalda spirea is highly appreciated in Japan for its compact habit and prolonged summer flowering, making it a staple of Asian ornamental gardens. Its scientific name 'Bumalda' comes from an old transliteration of the Japanese, reflecting its mountainous origins in Northeast Asia.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.