Smoke Bush (Cotinus coggygria)

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Sunlight Full sun to partial sun; full sun enhances foliage color and smoke inflorescences

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Watering Water deeply when top 5–7 cm of soil is dry; drought-tolerant once established

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Temperature Hardy to -20°C; tolerates heat up to 35°C; avoid prolonged frost on young shoots

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Leaf: Oval to obovate, 3–8 cm long; blue-green, purple, or green foliage varieties
Flower: Tiny yellow-green blooms in dense panicles; persistent feathery sterile flowers create "smoke" effect
Stem/Bark: Smooth, light brown young stems; gray-brown, fissured mature bark

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Watering

Water deeply every 7–10 days; reduce in rainy periods

Fertilization

Apply balanced slow-release fertilizer once. Avoid over-fertilizing to prevent leggy growth

Eggshell powder topdressing：Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around base in early spring; work lightly into topsoil

Pruning

Prune in late winter to early spring to shape and remove dead wood
Thin crowded branches to improve airflow and light penetration
Cut back hard every 2–3 years to encourage vigorous new growth and vibrant foliage

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No documented toxic effects for humans

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Culture: Symbolizes elegance and subtle beauty in garden design; purple varieties represent mystery

Usage: Ornamental garden shrub; cut flower arrangements for dried "smoke" inflorescences