Buddleia davidii 'Nanho Blue'

Nanho Blue Butterfly Bush

Buddleja davidii ‘Nanho Blue’ — commonly called Nanho Blue Butterfly Bush — is a compact, vigorous flowering shrub cherished for its abundant true blue-lavender flower spikes and strong appeal to butterflies and other pollinators. It’s a classic selection in many perennial gardens due to its reliable blooms and attractive habit.

Key features
Width / spread: 5–6 ft
Height: 5–7 ft (can be pruned shorter if desired)
Flower color: Blue-lavender with subtle orange eye
Bloom time: Mid-summer through early fall
Foliage: Gray-green, lance-shaped leaves
Form: Upright, arching shrub
Life cycle: Deciduous shrub

Growing conditions
Sun: Full sun (required for best flowering)
Soil: Well-drained; tolerates average to lean soils
Water: Low to moderate; established plants are drought tolerant
Hardiness:



Zone Low: 5b



Zone High: 9a



Landscape use
Butterfly and pollinator gardens
Specimen shrub
Back of perennial or shrub borders
Informal hedges and screens
Mixed native plantings

Notes
• Produces abundant flower spikes that attract butterflies and bees over a long season.
• Blooms on new wood — pruning each spring improves flowering.
• Responds well to light summer deadheading to prolong bloom.
• Fertile cultivar — may self-seed in favorable sites and is restricted or discouraged in some regions.

Plant type

Flowering Shrub

Height

8'

Width

8'

Hardiness zones

5–9

Sunlight

Full Sun

Growth rate

Fast

Bloom time

Summer

Flower color

Violet

Leaf color

Green

Fall color

Green

Attracts

Butterflies, Hummingbirds

Soil

Loamy well-drained

Landscape use

Accent Plant, Mass Planting

Shape

Oval/Rounded

Bark

Exfoliating

Fruit

Yes

Fragrant

Yes

Deer resistant

Yes

Salt tolerant

Yes

Drought tolerant

No