shrub

Blue Butterflies Caryopteris

Caryopteris divaricata 'Blue Butterflies'

The Story

Plant Bio

An herbaceous perennial that typically dies back to the ground in winter. It forms a rounded clump of aromatic, dark green leaves and is prized for its late-season flowers.

Features unique, cobalt-blue flowers with long stamens that resemble butterflies, attracting bees, hummingbirds, and butterflies from late summer into fall.

Uses & Benefits:

Ornamental UsesBlue Butterflies provides vibrant blue flowers that attract pollinators and add color to gardens.
Practical UsesDrought-tolerant and low-maintenance, ideal for sustainable landscapes.
Ecological BenefitsSupports bees and butterflies, enhancing local biodiversity.
SpeciesCaryopteris divaricataBluebeard

Essentials

At a Glance

Plant Type

Shrub

Height

48 inches

Width

48 inches

Light

Full Sun, Partial Sun

Zones

6, 7, 8, 9

Water

Dry to medium

Humidity

Low to moderate

Lifespan

Herbaceous Perennial

Native To

East Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Late summer – Early fall

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In flower about 2 months of the year

Planting

How to Grow

  1. Select a well-draining soil with neutral to slightly alkaline pH.
  2. Tuck seeds or cuttings into soil in early spring for best germination.
  3. Water regularly until established, then reduce frequency.
  4. Mist cuttings to maintain humidity during propagation.
  5. Prune lightly after flowering to shape and encourage new growth.
  6. Apply a balanced fertilizer in spring for optimal growth.

Pro Tip

Use well-draining soil and full sun for vibrant blooms and healthy growth.

Keep It Thriving

Care Guide

Do

  • Water deeply during dry spells 💧
  • Prune after flowering to promote bushiness ✂️
  • Mulch around the base to conserve moisture 🌱

Don't

  • Avoid overwatering to prevent root rot ❌
  • Don't prune in late fall or winter ❄️
  • Avoid heavy fertilization late in the season

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Fertilize
Mulch
Plant
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Silver-foliaged hedgeLate summer blooming borderDrought-tolerant xeriscape accent

Companion Plants

Lavender SalviaRussian sage CoreopsisSedum

Multiply

Propagation Methods

Good to Know

Common Questions

Blue Butterflies Caryopteris questions

What zones can Blue Butterflies Caryopteris grow in?

Blue Butterflies Caryopteris is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Blue Butterflies Caryopteris deer resistant?

Yes — Blue Butterflies Caryopteris is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Blue Butterflies Caryopteris bloom?

Blue Butterflies Caryopteris typically blooms in late summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Blue Butterflies Caryopteris need full sun?

Blue Butterflies Caryopteris does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Blue Butterflies Caryopteris drought tolerant?

Yes — once established (usually after the first full season), Blue Butterflies Caryopteris handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.

Keep exploring

Grow Blue Butterflies Caryopteris with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.