Also known as Buddleia · Buddleja · Butterfly Bush
Buddleja japonica is a deciduous shrub native to East Asia, known for its fragrant, lilac-like flowers that attract pollinators. It is an ornamental plant valued for its
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers at least 6 hours of direct sunlight daily for optimal flowering and growth.
Moderate
50% intensity
Keep soil consistently moist, reduce in winter. Ensure good drainage.
Well-drained
50% intensity
Moderate
50% intensity
Prefers temperatures between 15-25°C. Can tolerate cooler conditions but avoid prolonged frost.
Low
25% intensity
Annual feeding in spring with a balanced fertilizer is usually sufficient.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, especially during dry periods, to keep the soil consistently moist but not waterlogged. Reduce watering in winter dormancy.
Ensure good drainage to prevent root rot, as Buddleja japonica prefers slightly drier conditions once established.
Prune in late winter or early spring before new growth begins. Remove dead, damaged, or crossing branches. Lightly shape the plant to maintain its structure and encourage vigorous flowering.
Hard pruning can rejuvenate older plants.
Easily propagated from semi-hardwood cuttings taken in summer. Dip cuttings in rooting hormone and plant in a well-draining potting mix. Keep moist and provide bottom heat for best results.
Seed propagation is also possible but may not result in true-to-type plants.
Young plants benefit from repotting every 1-2 years in spring to refresh the soil and provide more space. Mature plants in garden beds generally do not require repotting. Use a well-draining potting mix when repotting.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Buddleja Japonica (Buddleja japonica)
Where Buddleja Japonica (Buddleja japonica) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Lamiales |
| Family | Scrophulariaceae |
| Genus | Buddleja |
| Species | Buddleja japonica |
Similar in genus Buddleja
Answers based on plant encyclopedia data
