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How to Grow Smoke Bush Royal Purple

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Smoke Bush Royal Purple

Cotinus coggygria 'Royal Purple'

shrub

A deciduous ornamental shrub prized for its deep burgundy-purple foliage that intensifies in fall and produces distinctive feathery, smoke-like flower clusters in summer. The plant creates a striking focal point in landscapes with its dramatic color and airy texture. Royal Purple is a cultivar selected specifically for enhanced foliage pigmentation.

Looking for a specific variety?

Royal Purple Velvet Cloak Purpureus Grace Young Lady Nordine Red

When should you plant Smoke Bush Royal Purple in your zone?

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Example Smoke Bush Royal Purple timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Smoke Bush Royal Purple

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Smoke Bush Royal Purple

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Smoke Bush Royal Purple dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6-8 hours daily (essential for deep purple foliage color)
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Water: Moderate; water regularly during establishment (first 2 years). Once established, drought-tolerant but performs better with occasional deep watering during extended dry periods. Avoid waterlogging.
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Spacing: 120 inches
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Days to maturity: Not applicable for ornamental shrub; reaches mature size in 3-5 years
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Planting depth: Plant at same depth as root ball; do not bury crown

Soil

Type: Well-draining loamy to sandy soil
pH: 6.0-7.5
Amendments:
Compost or aged bark mulch for moisture retention Perlite or coarse sand if soil is heavy clay Avoid excessive fertility

Growing Zones

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Thrives in zones 5-8, hardy to zone 4b

4b 5a 5b 6a 6b 7a 7b 8a 8b 9a

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Growth Stages

1

Establishment

First year

Young transplant with initial leaf growth; foliage may be lighter purple initially

Water regularly to establish deep root system. Avoid fertilizing in first year. Mulch around base. Provide stake support if planted in windy location.

2

Vegetative Growth

Spring through summer, years 2-3

Vigorous stem and leaf expansion; foliage deepens to rich burgundy-purple color

Prune lightly after flowering to shape and maintain form. Remove any green-leaved reversions immediately. Ensure full sun exposure. Do not over-fertilize as excessive nitrogen reduces color intensity.

3

Flowering

June-July, 4-6 weeks

Delicate, feathery panicles emerge in early to mid-summer, appearing smoky pink to reddish in color

Allow flowers to fully develop for maximum ornamental effect. Flowers persist on plant for several weeks. Dead-head spent flower clusters if desired for tidier appearance, or leave for wildlife.

4

Summer Maturity

July-September

Full-sized shrub with dense purple foliage and lingering smoke-like seed heads; color remains vibrant

Maintain moderate watering. Monitor for pests. Foliage color intensifies with stress and cooler nights. Full sun is critical at this stage.

5

Fall Transition & Dormancy

October-November; dormancy December-March

Foliage transforms to brilliant orange, red, and deep burgundy before leaf drop; branches reveal elegant structure

Reduce watering as growth slows. This is the prime landscape display period. After leaf drop, prune to remove dead wood and shape plant. Apply dormant oil if pest management is needed.

Companion Planting

Plan your garden →

Plant with:

Russian Sage (Perovskia) Butterfly Weed (Asclepias) Black-eyed Susan (Rudbeckia) Catmint (Nepeta) Ornamental grasses (Miscanthus, Panicum) Coreopsis Yarrow (Achillea) Lavender

Avoid planting near:

Legumes (nitrogen-fixing plants that encourage excessive soft growth) Plants requiring consistent moisture Shade-casting large trees that reduce light availability

Common Pests

  • Maintain plant vigor with proper care. Remove heavily infested branches. Monitor for sawdust-like frass at entry holes. Use horticultural oil or insecticidal soap in early spring as preventive.

  • Strong water spray dislodges light infestations. Use insecticidal soap or neem oil for moderate infestations. Avoid excess nitrogen fertilizer.

  • Increase humidity around plant. Apply miticide or horticultural oil spray. Repeat every 7-10 days if needed.

  • Prune out heavily infested branches. Apply dormant oil in late winter/early spring. Use horticultural oil during growing season.

  • Ensure good air circulation; prune interior branches. Apply sulfur dust or neem oil. Avoid wetting foliage in evening. More common in humid climates; Royal Purple is relatively resistant.

Uses

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Landscape Focal Point

Ornamental

Royal Purple's deep burgundy foliage and smoky flower plumes make it an outstanding specimen plant or anchor for mixed borders. The color contrast with green and silver-leaved plants is striking. [source]

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Cut Arrangements

Household

The feathery flower panicles and colorful foliage are excellent for fresh or dried floral arrangements, adding texture and color to indoor displays. [source]

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Pollinator Support

Wildlife

Small flowers attract bees and other pollinators. The shrub's open structure and seed heads also provide food and shelter for birds in fall and winter. [source]

🎨

Dried Smoke Plumes

Craft

Harvest flower panicles and hang them upside down in a warm, dry location to create long-lasting dried arrangements. The smoke-like texture is highly valued in dried flower crafts. [source]

💊

Traditional Uses

Medicinal

Historically, Cotinus species have been used in traditional medicine for tannins and other compounds, though Royal Purple is primarily ornamental. Modern use is cosmetic rather than medicinal. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Not harvested for culinary use. Prune branches with smoke-like flower panicles in mid to late summer for decorative indoor arrangements. Cut stems last 1-2 weeks in water. For propagation, take softwood cuttings in summer or hardwood cuttings in fall.

Fun Facts

  • 🌱 The 'smoke' effect comes from the ornamental, hair-like sterile flower stems that persist on the plant; they create a cloud-like haze that is especially prominent in large groups or when backlit by sunlight.
  • 🌱 Royal Purple foliage color is enhanced by stress conditions such as poor soil, low fertility, and even moderate drought—conditions that would stress many plants actually intensify the burgundy-purple pigmentation.
  • 🌱 Smoke Bush has been cultivated for ornamental purposes for centuries and was a favorite in Victorian estates; the genus name 'Cotinus' comes from the Greek word for 'wild olive.'

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Full Sun Mulch Transplant
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