Cotinus coggygria: The Purple Smoke Cloud of the Garden

Some plants in the garden catch your gaze from wherever you stand. Cotinus coggygria is exactly that. Those deep purple-burgundy leaves, those smoke cloud flowers. One of the first plants the eye lands on when entering our garden.

Ours is still young but already drawing attention with those characteristic purple leaves. When flowering season arrives in July and August, with those fluffy pink-beige smoke clouds hanging from the branches, the garden will take on a completely different character.

Scientific Identity

Full name: Cotinus coggygria. Family: Anacardiaceae. Origin: Wide geographic distribution from Southern Europe to Central Asia and China. Common names: Smoke tree, Smoke bush, Venetian sumac. Type: Deciduous large shrub or small tree. Height: 3-5 meters, can reach 6-7 meters in some cases.

Royal Purple: The Most Popular Cultivar

Cotinus coggygria has hundreds of varieties but the most popular are the dark-leaved ones. Royal Purple is the most common. Leaves are bright purple-red in spring, deep purple-burgundy in summer, then an orange-red-purple color symphony in autumn. Different in all four seasons, beautiful in all four seasons.

Our Cotinus in the photo with those characteristic dark burgundy leaves must be Royal Purple or a similar cultivar.

Smoke-Like Flowers

What actually makes Cotinus special is not the flowers themselves but what comes after. Small yellowish flowers open in July and August. Most are inconspicuous, sparse and small. The real show begins when the flower stalks elongate and the fluffy structures on them mature.

These fluffy extensions swaying in the breeze genuinely give the impression of a smoke cloud. Shifting between pink, beige and grey tones depending on the light. Looking from a distance it seems as if there's a light mist around the tree. This is why the name smoke tree fits so perfectly.

Four-Season Garden Plant

Cotinus coggygria offers a different character in all four seasons. Spring brings fresh purple leaves and small flowers. Summer brings deep burgundy leaves and those smoke clouds. Autumn brings an orange-red color show, its most spectacular period. In winter after leaf fall that branching structure becomes visible.

In permaculture design plants that offer four-season aesthetics are very valuable. They provide a focal point in the garden in every period.

Permaculture and Ecological Value

Cotinus coggygria is a good nectar source for wild bees and insects. During intense flowering periods you can observe many beneficial insects in the garden. Its fast growth creates shaded areas in a short time. Leaf fall provides rich organic matter. Its excellent drought tolerance makes it ideal for low-watering gardens.

Design Value

Landscape designers frequently use Cotinus for color contrast. That deep purple color creates very powerful contrast among green-leaved plants. Silver-leaved eucalyptus, green-leaved plants and this purple Cotinus beside them creates a very impressive color palette in the garden. Our garden has exactly this combination.

Care

Full sun ideal, partial shade works but dark leaf color becomes more intense with sun. Very drought tolerant, needs almost no watering once established. Not soil selective, performs well even in poor soils. Rich soil produces more leaves and fewer flowers, poor soil produces more flowers. Cold hardy to -20 degrees. Pruning: Strong spring pruning produces larger and darker leaves. But pruning reduces flowering. Decide based on whether you want pruning or flowers.

If you don't have a Cotinus coggygria in your garden, add one this year. The first year modest, second year stronger, from the third year you will start seeing that smoke cloud show. It will be one of the most dramatic moments in your garden.