Caryopteris Longwood Blue

Longwood Blue Caryopteris

A classic, dependable late-season flowering shrub producing abundant clusters of deep true-blue flowers from late summer into early fall. Aromatic gray-green foliage provides a soft contrast to the intense bloom color. ‘Longwood Blue’ has a fuller, more upright habit than many older cultivars and is prized for reliable performance and strong garden presence.


Plant Characteristics


Type: Deciduous shrub



Form: Upright to rounded



Mature Width: 3–4 ft



Mature Height: 3–4 ft



Flower Color: Deep blue



Foliage Color: Gray-green, aromatic




Growing Conditions


USDA Hardiness Zones: 5a–9b



Light: Full sun (best flowering and compact habit)



Soil: Average to dry, well-drained soils



Water: Low to moderate; drought tolerant once established



Maintenance: Low; cut back hard in early spring (blooms on new wood)




Landscape Uses
Shrub borders, pollinator gardens, perennial-style plantings, mass plantings, and foundation beds. Excellent for providing late-season blue color when few shrubs are in bloom.


Care Tips


Prune to 6–12 in in early spring to promote vigorous flowering



Avoid wet winter soils



Performs best in hot, sunny locations

Plant type

Flowering Shrub, Perennial

Height

2'

Width

2'

Hardiness zones

5–9

Sunlight

Full Sun

Growth rate

Fast

Bloom time

Early Fall, Fall, Late Summer

Flower color

Blue

Leaf color

Asparagus

Attracts

Butterflies

Soil

Moist well-drained

Shape

Rounded, Upright

Bark

Smooth

Fruit

Yes

Fragrant

Yes

Deer resistant

Yes

Drought tolerant

No