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Fountain Butterfly-Bush (Buddleja alternifolia), whole plant
  • Fountain Butterfly-Bush — close-up of leaves and flowers
  • Fountain Butterfly-Bush — seasonal appearance
  • Fountain Butterfly-Bush in a garden setting

Fountain Butterfly-Bush

Buddleja alternifolia

Easy · Beginner friendly

About Fountain Butterfly-Bush

Fountain Butterfly Bush is a Chinese deciduous shrub or small tree growing 10 to 15 feet tall, unique among butterfly bushes for its alternate leaf arrangement and spring bloom. Fragrant lilac-purple flowers coat the long arching branches in late spring before most butterflies are active, making it a refined specimen for American cottage and pollinator gardens.

  • Fragrant
  • Drought-tolerant
  • Cold-hardy
  • Pollinator-friendly
WATER
Regular
Top inch dry
LIGHT
Full sun
6+ hrs direct
HARDY
Hardy to -20°F (-29°C)
USDA hardiness zones 5–9

How to care for Fountain Butterfly-Bush

Watering

  • Springevery 7 days
  • Summerevery 5 days
  • Fallevery 10 days
  • Winterevery 21 days

Soil · Rich & loamy

  • Top dressingBark mulch15%
  • Main mixRich loam + compost 3:170%
  • DrainageGravel15%

Use fully finished compost — fresh compost burns roots.

FERTILIZER

Balanced Feed 14-14-14

An even feed covers all three needs at once, keeping leaves, roots and blooms moving together with nothing pushed out of balance.

N33%P33%K33%
  • Nitrogen · Leaves
  • Phosphorus · Roots + Blooms
  • Potassium · Strength
  • Springevery 45 days
  • Summerevery 60 days
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At a Glance

  • NativeEast Asia
  • Height10–20 ft (3–6.1 m)
  • Spread10–15 ft (3–4.6 m)
  • Flower colorPurple
  • Foliage colorGreen, Silver
  • SoilWell-drained, Loamy
  • LocationsYard

Bloom time

BLOOM CYCLE

Peak bloom

Mar–May

J
F
M
A
M
J
J
A
S
O
N
D

Fragrant lilac-purple flowers coat arching stems in late spring

Fragrance

MODERATE FRAGRANCE

Flowers honey-sweet, attractive to butterflies.

Toxicity

Humans Slight

iridoid glycosides

Slight

  • All
  • Ingestion

EXPOSURE Eating any part of the plant.

EFFECT Mild GI upset.

NOTE Documented concern for humans: Mild GI upset.

Not reported

EXPOSURE No exposure route is reported.

EFFECT No toxic effect is reported.

NOTE No toxicity is reported for dogs in this catalog; this is not evidence that the plant is edible or harmless.

Not reported

EXPOSURE No exposure route is reported.

EFFECT No toxic effect is reported.

NOTE No toxicity is reported for cats in this catalog; this is not evidence that the plant is edible or harmless.

Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.

DISTRIBUTION

Fountain Butterfly-Bush · Native
  • Native
  • Introduced
  • East Asia

History

Illustrated historical scene for Fountain Butterfly-Bush

Buddleja alternifolia grows on dry rocky slopes and riverbanks of Gansu, Qinghai, Shaanxi, and Tibet in northwestern China. The English plant collector Reginald Farrer introduced it in 1914 after seeing it flowering along the Min River, describing it as a 'gracious small-leaved willow hung out all over with airy sprays of softest lilac'. Adrien Franchet had described the species botanically in 1887.

Unlike other Buddlejas, which flower on new wood, it blooms on the previous year's growth, requiring different pruning. Its graceful weeping habit led some to grow it as a small standard tree. It won the RHS Award of Garden Merit in 1993.

The silver-leaved cultivar 'Argentea' is particularly admired. It remains a connoisseur's buddleja, valued where gardeners want a more refined alternative to B. davidii. Discovered in Gansu, China by botanist William Purdom in 1914 and introduced to Western gardens via Reginald Farrer. Won the RHS Award of Garden Merit and became a favorite specimen shrub in American estate and refined cottage gardens, trained as a small weeping tree for specimen effect.

Symbolism & meaning

What It Symbolizes

Fountain Butterfly-Bush earns its name in May, when arching stems cascade in lavender bloom like a breaking spring of grace. As one of the earliest butterfly bushes to flower, it offers a feast for newly emerged bees and butterflies still searching for nectar. Its meaning is generosity poured out — a fountain in form, in fragrance, and in the welcome it gives every spring pollinator.

  • Fountain of grace — arching stems cascade in bloom
  • Spring bee feast — early butterfly bush for spring pollinators

Where the Name Comes From

The name Fountain Butterfly-Bush describes its fountain-like habit. 'alternifolia' from Latin means alternate-leaved, unique among butterfly bushes which typically have opposite leaves.

Uses & Fun Facts

  • Honey-scented lavender flowers cascade along arching stems
  • Arching spring sprays draw butterflies before many shrubs reach peak bloom
  • Weeping form makes a striking small flowering tree

Related plants

More Buddleja plants

Plants with similar care

Frequently asked questions

How often should I water Fountain Butterfly-Bush?

In summer, water about every 5 days; in winter, about every 21 days. Adjust for heat, pot size and drainage.

How much light does Fountain Butterfly-Bush need?

Full sun: 6+ hrs direct. Watch the leaves — scorching or stretching means the light needs adjusting.

Is Fountain Butterfly-Bush toxic to cats or dogs?

Pets Not reported (Dogs Not reported · Cats Not reported) Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.

Is Fountain Butterfly-Bush easy to grow?

Yes — it is considered an easy, beginner-friendly plant.

When does Fountain Butterfly-Bush bloom?

It typically blooms Mar–May in the Northern Hemisphere.

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