Butterfly Bush
Buddleja davidii
A deciduous, multi-stemmed shrub known for its arching branches, lance-shaped grayish-green leaves, and long, dense panicles of vibrant purple, pink, or white flowers.
- Light
- Full sun, requiring at least six to eight hours of direct sunlight daily for optimal flowering.
- Water
- Moderate water needs once established. Highly drought tolerant. Water when the top few inches of soil feel dry to the touch; avoid waterlogged conditions.
- Growth
- Deciduous perennial shrub with a fast growth rate, typically reaching mature heights and spreads of 6 to 12 feet depending on the specific variety and pruning practices.
Care instructions
Provide full sun and well-draining soil. Water deeply during establishment and periods of extended drought, allowing the soil to dry slightly between waterings. Prune hard in early spring before new growth begins to encourage abundant seasonal flowering.
Growing details
Sunlight
Full sun, requiring at least six to eight hours of direct sunlight daily for optimal flowering.
Watering
Moderate water needs once established. Highly drought tolerant. Water when the top few inches of soil feel dry to the touch; avoid waterlogged conditions.
Soil
Prefers loamy, well-draining soil with a neutral to slightly alkaline pH range of 6.0 to 7.5, though it adapts well to various soil types as long as drainage is good.
Hardiness zone
USDA hardiness zones 5 through 9, demonstrating good cold tolerance in winter and heat tolerance in summer.
Growth habit
Deciduous perennial shrub with a fast growth rate, typically reaching mature heights and spreads of 6 to 12 feet depending on the specific variety and pruning practices.
Bloom season
Blooms from mid-summer through autumn, producing elongated terminal panicles filled with numerous small, brightly colored, fragrant tubular flowers.
Propagation
Easily propagated through softwood cuttings taken in late spring or semi-hardwood cuttings in summer, as well as by seed sown in spring.
Common pests & issues
Generally resilient, but susceptible to spider mites and root rot if grown in poorly draining, overly wet soils. Proper spacing and airflow help prevent fungal leaf spot issues.
Similar species
Look-alike species include other members of the Buddleja genus, such as Buddleja globosa which features spherical flower heads rather than elongated panicles.