1 / 4Key characteristics
- Family
- Lamiaceae
- Height
- 2 to 3 feet
- Width
- 2 to 3 feet
- Flower color
- Deep, vibrant blue
- Foliage color
- Silvery-green, aromatic leaves
- Bloom time
- Late summer to fall
- Light
- Full sun
- Water
- Low
- Maintenance
- Low; prune in early spring to encourage new growth and maintain shape
- Growing zone
- USDA Zones 5 to 9
- Wildlife
- Attracts bees, butterflies, and hummingbirds; deer-resistant
Shrubs
Caryopteris x clandonensis 'Dark Knight'
Dark Knight Bluebeard
Caryopteris x clandonensis 'Dark Knight' is a compact, deciduous shrub celebrated for its deep blue flower clusters that bloom from late summer into fall. The flowers emerge on new growth, making this plant ideal for annual pruning. The aromatic foliage complements its blooms, enhancing its appeal in garden settings. Its compact habit makes it an excellent choice for smaller spaces or as part of a mixed border.
Works well in
- Sun Gardens
- Waterwise Gardens
- Hummingbird Gardens
- Pollinator Gardens
Companion plants
Manzanita · California lilac · Poppy · Foxtail lily · Oregano · Globe artichoke
Design tip
Deep blue flowers can add welcome richness to a sunny garden just as many summer colors begin to fade. Repeat silvery foliage and touches of blue nearby to create rhythm, then allow a few warmer late-season flowers to provide contrast and keep the planting lively.
More shrubs

Abies pinsapo 'Horstmann'
Horstmann Spanish Fir
Blooms purplish spring cones maturing to reddish brown upright seed cones
Full sun

Juniperus squamata 'Blue Star'
Blue Star Juniper
Blooms non-flowering; produces small cones
Full sun

Santolina chamaecyparissus 'Pretty Carroll'
Pretty Carroll Lavender Cotton
Blooms bright yellow, button-like clusters
Full sun

Podocarpus lawrencei 'Blue Gem'
Blue Gem Mountain Plum Pine
Blooms not significant
Prefers full sun to partial shade