About
Buddleja x weyeriana 'Boy Blue' is a deciduous shrub that typically reaches heights of 3 to 4 meters. It features long, arching branches adorned with lanceolate leaves that measure up to 20 centimeters in length, displaying a grey-green hue in their younger stages. During the summer and autumn, this plant produces rounded clusters of fragrant flowers, which are pale mauve-blue with a distinct orange center, arranged in open terminal panicles.
About the genus
Buddleja comprises evergreen and deciduous shrubs, and in some cases, it can also be found as small trees or scrambling climbers. The foliage consists of simple leaves, and the plants produce clusters of small, tubular flowers that emit a pleasant fragrance.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H6
Plant details
- Plant type
- Shrubs
- Habit
- Spreading branched
- Foliage
- Deciduous
- Height
- 2.5-4 metres
- Spread
- 1.5-2.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Coastal, Cottage and informal garden, Gravel garden, Patio and container plants, Wildlife gardens
- Fragrance
- Flower
Care notes
- Cultivation
- Grow in well-drained soil in full sun. See buddleja cultivation for more detailed advice
- Pruning
- Pruning group 6
- Propagation
- Propagate by semi-ripe cuttings in summer, or by hardwood cuttings in autumn
- Pest resistance
- May be susceptible to aphids, capsid bugs, caterpillars, earwigs, figwort weevils, glasshouse red spider mite, leaf and bud eelworm, and mullein moth
- Disease resistance
- May be susceptible to honey fungus, fungal leaf spot, and virus diseases