Spiraea cinerea
Spiraea cinerea · Rosaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around spiraea cinerea and prepare for winter.
ID card
- Scientific name
- Spiraea cinerea
- Foliage
- Deciduous
- Flowering
- March to April
- Flower color
- Pure white
- Adult size
- Approximately 1.5 m in height
- Growth
- Fast
- Hardiness
- Very hardy (down to -20 °C)
- Origin
- Europe and Asia
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Prune immediately after flowering (April) to regenerate: this spiraea is deciduous and its spring beauty depends on a rejuvenating prune every year.
The common mistake
Not pruning or pruning too late (June): it becomes leggy and bushy, produces sparse flowers, and loses its graceful form.
The pro's trick
Remove the oldest third of the wood each year after flowering: this rejuvenates without leaving visible gaps.
Care
Exposure
Gray spiraea demands full sun exposure for generous flowering and compact habit. It also tolerates partial shade, but produces fewer flowers and becomes more leggy. Install it in a bright location, sheltered from strong winds if possible.
Watering
Water requirements are moderate. Water regularly during the first year of establishment to encourage rooting. Once established, spiraea is quite drought-tolerant and only needs watering during prolonged heat periods. Avoid waterlogged soil.
Pruning
Prune after flowering (May-June) to maintain a harmonious shape and encourage branching. Cut flowering shoots back by two-thirds of their length. Remove dead or damaged wood each year. Regular pruning prevents congestion in the center of the shrub.
Soil
Gray spiraea adapts to most ordinary, light to medium soils. It appreciates well-drained soil that is slightly humus-rich. Improve poor soil by incorporating compost when planting. Avoid overly chalky or excessively acidic soils.
Fertilizing
A well-established spiraea does not require intensive fertilization. Apply compost or balanced fertilizer in spring to boost growth. On poor soils, repeat application in early summer. Prefer organic amendments to chemical fertilizers.
Diseases and pests
Spiraea cinerea is generally very hardy and rarely susceptible to common diseases. Watch for powdery mildew outbreaks in cases of stagnant humidity combined with moderate warmth. Aerate the shrub through regular pruning. No major pests typically threaten it in our temperate regions.
Did you know?
Gray spiraea is famous for its incredible profusion of tiny white flowers that completely cover the shrub in spring, earning it the nickname 'white plume'. Long ago, traditional gardeners planted it as landscape hedges to mark property boundaries by creating spectacular floral barriers. The genus Spiraea gave its name to spirillic acid, a substance historically extracted to synthesize aspirin.
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.