About Japanese Spiraea
A deciduous shrub native to Japan, China, and Korea, known for its clusters of small pink or white flowers in summer.
Care Requirements
Water Needs
every 7–10 days during active growth, less frequently in winter
Water thoroughly until runoff, allow soil to dry slightly between waterings, and...Light Requirements
Full sun to partial shade
Full sun (6–8 hours/day) in spring and summer; partial shade during intense su...Care Level
Moderate
moderateSoil Requirements
well-drained, loamy soil with moderate fertility
Mulch to retain moisture; avoid compacted soil; ensure good aeration....Temperature Needs
Prefers 60–75°F (15–24°C); tolerates cooler temperatures but avoids prolonged frost.
Avoid sudden temperature fluctuations; protect from frost; ensure good air circu...Common Problems & Solutions
Yellow Leaves
Yellow leaves in Spiraea japonica may indicate nutrient deficiencies, overwatering, or pest infestat...
Diagnose & FixWilting
Wilting in Spiraea japonica can result from water stress, either due to drought or overwatering, lea...
Diagnose & FixComplete Care Guides
How to Propagate
Softwood or semi-hardwood cuttings in late spring or early summer....
Best Time: Late spring to early summer when new growth is firm but not woody.
Full Propagation GuideHow to Prune
Selective thinning of branches; heading back to encourage denser growth....
Frequency: Annually in late winter or early spring before new growth begins.
Full Pruning GuideHow to Repot
Remove plant gently; trim roots if necessary; repot in fresh, well-draining soil with a slightly lar...
Best Season: Early spring before active growth starts.
Full Repotting GuideHow to Fertilize
Use balanced, slow-release fertilizer in early spring; avoid over-fertilizing, especially in late su...
Frequency: every 4–6 weeks during spring and summer
Full Fertilizing GuideFrequently Asked Questions
Q: How often should Spiraea japonica be watered?
A: Water deeply once a week, ensuring the soil is moist but not waterlogged.
Read Full AnswerQ: Does Spiraea japonica require pruning?
A: Yes, prune in late winter or early spring to maintain shape and encourage flowering.
Read Full AnswerQ: What soil type is best for Spiraea japonica?
A: It thrives in well-drained, fertile soil with a slightly acidic to neutral pH.
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