The Site Gardener

Plant Library

Explore 4,545 plants, with photos and growing details.

Back to Tools

← Back to plant results

Buddleia Nanho Purple

Nanho PurpleButterfly Bush

uddleja davidii ‘Nanho Purple’ — commonly known as Nanho Purple Butterfly Bush — is a compact to medium-sized deciduous shrub valued for its rich purple flower panicles, refined habit, and excellent pollinator appeal. Compared with standard Buddleia cultivars, ‘Nanho Purple’ stays shorter and more controlled, making it easier to place in mixed borders while still delivering strong summer color.

Key features
Width / spread: 4–6 ft
Height: 5–7 ft (can be maintained at ~4–6 ft with annual pruning)
Flower color: Deep purple with orange eye
Bloom time: Mid-summer through fall
Foliage: Gray-green, lance-shaped leaves
Form: Upright with lightly arching branches
Life cycle: Deciduous shrub

Growing conditions
Sun: Full sun (required for best flowering and compact habit)
Soil: Well-drained; average to lean soils preferred
Water: Low to moderate; drought tolerant once established
Hardiness:



Zone Low: 5b



Zone High: 9a



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

Notes


More compact and refined than many traditional Buddleja



Blooms on new wood — prune hard in early spring for best flowering and size control



Strong fragrance; highly attractive to butterflies, bees, and hummingbirds



Fertile cultivar — may self-seed; restricted or discouraged in some regions

Plant type
Deciduous Shrub, Flowering Shrub
Height
3-5'
Width
3-5'
Hardiness zones
5–8
Sunlight
Full Sun
Growth rate
Fast
Bloom time
Early Fall, Late Summer
Flower color
Lavender
Attracts
Bees butterflies birds
Soil
Loamy well-drained
Landscape use
Container
Shape
Mounded
Fruit
Yes
Fragrant
Yes
Deer resistant
Yes
Drought tolerant
No