Caryopteris x clandonensis 'Blue Knoll'
Blue Mist Spirea, Bluebeard
Blue Mist Spirea, Bluebeard
Type Shrub, woody plant
Hardy range 6A to 9B
Height 24" to 36" / 60cm to 90cm
Spread 24" to 36" / 60cm to 90cm
Growth rate Average
Form Rounded
Exposure Partial shade or partial sun to full sun
Persistence Deciduous
Hardy range 6A to 9B
Height 24" to 36" / 60cm to 90cm
Spread 24" to 36" / 60cm to 90cm
Growth rate Average
Form Rounded
Exposure Partial shade or partial sun to full sun
Persistence Deciduous
Bloom Color Blue
Bloom Time Summer and Fall
The flowers are showy.
Bloom Time Summer and Fall
The flowers are showy.
Environment
This plant tolerates some drought.
This plant will grow in dry soil.
Suitable soil is well-drained/loamy, sandy or clay.
The pH preference is an acidic to slightly alkaline (less than 6.8 to 7.7) soil.
This plant tolerates some drought.
This plant will grow in dry soil.
Suitable soil is well-drained/loamy, sandy or clay.
The pH preference is an acidic to slightly alkaline (less than 6.8 to 7.7) soil.
Leaf Color Green and silvery
Fall Color No change in fall color
Fall Color No change in fall color
Landscape Uses
- Container plantings
- Alpine garden
- Rock garden
- Border
- Massing
- Groundcover
- Container plantings
- Alpine garden
- Rock garden
- Border
- Massing
- Groundcover
Culture Notes
Caryopteris is grown for its attractive, fragrant foliage and flowers. Blooms appear on current year's growth and appear from late summer through early autumn. Place in full sun for best flowering. Plant dies back and can be treated as a perennial. Plants attract an assortment of pollinators. The bumblebee seems to prefer the blossom. Plants also serve as butterfly nectar sources. Prune away flower heads after they are spent to avoid seeding. This will also help in the vigor of the shrub. Avoid planting in heavy wet soils. This plant is considered mostly allergy free and causes little or no allergy problems in most people.
Caryopteris is grown for its attractive, fragrant foliage and flowers. Blooms appear on current year's growth and appear from late summer through early autumn. Place in full sun for best flowering. Plant dies back and can be treated as a perennial. Plants attract an assortment of pollinators. The bumblebee seems to prefer the blossom. Plants also serve as butterfly nectar sources. Prune away flower heads after they are spent to avoid seeding. This will also help in the vigor of the shrub. Avoid planting in heavy wet soils. This plant is considered mostly allergy free and causes little or no allergy problems in most people.
