Key takeaways
- Cotinus grows in almost any well-drained soil, including clay and chalk
- Give it full sun to keep purple leaves rich and dark
- Leave it unpruned for smoky flowers, or cut it hard in late winter for big leaves
- Skip the manure and feed, as lean soil gives the best colour
- Autumn colour peaks in October in scarlet, orange and gold
Cotinus, the smokebush, is a real show-off in a UK garden. From June to August it’s covered in fluffy pink and purple plumes that look like puffs of smoke. Then in autumn the leaves blaze scarlet and orange. It looks good in every season.
Most garden types are forms of Cotinus coggygria, plus a few hybrids like ‘Grace’. They’re hardy across the UK, including Scotland and the north. The RHS cotinus page lists plenty more to browse.
Which cotinus variety should I grow?
It comes down to size, leaf colour, and whether you’re after smoky flowers or autumn fireworks. These four are all good, reliable choices.
From left: the deep plum of ‘Royal Purple’, the warm pink tones of ‘Grace’ and the lime-gold of ‘Golden Spirit’.
| Feature | Royal Purple | Grace | Golden Spirit | Young Lady |
|---|---|---|---|---|
| Leaves | Deep plum-purple | Wine-red | Lime to gold | Mid-green |
| Size | Large | Very large | Medium | Small |
| Smoke | Pink-purple | Pink-red | Pink | Pink |
| Autumn colour | Scarlet-red | Orange to scarlet | Orange to red | Yellow to orange |
| Best for | Borders, a star plant | Big gardens, screening | Small gardens, contrast | Small spaces, pots |
‘Royal Purple’ is the classic, with rich plum leaves all summer.
‘Grace’ is a big, vigorous hybrid with large leaves. It’s a great choice if you want a big flowering shrub to fill a boundary or hide an eyesore.
‘Golden Spirit’ brightens a dull corner with lime-gold leaves, and stays smaller.
‘Young Lady’ is compact and flowers freely even when young, so it suits small gardens and pots.
What soil does cotinus need in the UK?
Any soil that drains well. Clay, chalk, sand and loam are all fine. Drainage matters much more than richness.
On chalk, cotinus is right at home.
On sandy soil, it may be a little slow at first. A bark mulch helps hold moisture. Once settled, it’s very drought-tolerant and rarely needs watering.
Don’t enrich the soil with compost or manure. It’s the most common mistake. Rich soil gives lush but dull leaves, and purple types can turn a muddy green-brown. Lean soil gives the best colour.
| Soil | How it does | Tip |
|---|---|---|
| Heavy clay | Great | Make sure it doesn’t sit wet in winter |
| Chalk | Great | No changes needed |
| Sandy | Good | Mulch for the first couple of years |
| Loam | Good | Don’t feed |
| Boggy | Poor | Raise the soil or pick another spot |
How to plant cotinus smokebush
Plant bare-root cotinus from October to March, or potted ones any time. Autumn is ideal, as the roots settle over winter.
Step 1: Pick a spot in full sun. Purple types lose their colour in more than a little shade. South or west-facing borders are perfect.
Step 2: Dig a hole twice as wide as the rootball and the same depth. Don’t plant too deep.
Step 3: Set the plant so the top of the rootball is level with the soil. Fill in with the soil you dug out. No compost or feed.
Step 4: Firm gently with your boot and water in well.
Step 5: Spread a bark mulch around the base, keeping it off the stem.
Spacing: Allow 3-4m between plants you’ll leave unpruned, or about 2m if you’ll cut them back each year. In a mixed border, one cotinus makes a great backdrop for lower plants in front.
How to prune cotinus in the UK
You have a choice here, and each gives you a very different plant: flowers or big leaves.
Cutting cotinus back in late February. All stems go down to about 30cm with sharp loppers.
Option 1: No pruning (smoke flowers)
Leave it alone and it grows into a big rounded shrub or small tree with the classic smoky plumes in summer. Just remove dead, damaged or crossing branches in late winter.
Option 2: Hard pruning / stooling (large foliage)
In late February or early March, cut all stems down to about 30cm. It sends up strong new shoots with much bigger, bolder leaves. The catch is no flowers that year, as it flowers on older wood.
Option 3: Alternate year pruning
Cut it hard one year, then leave it the next. You get big leaves one summer and smoky flowers the following one. Lots of gardeners love this middle way.
For more on pruning shrubs, see our step-by-step guide.
Month-by-month cotinus care calendar
| Month | Jobs |
|---|---|
| January | Check stakes on young plants. Order bare-root plants. |
| February | Cut back hard if you’re growing for leaves. |
| March | Mulch with bark. Plant potted cotinus. |
| April | New leaves appear. Snip off any frost-damaged tips. |
| May | Growing fast. No feeding needed. |
| June | Smoky plumes start on unpruned plants. |
| July | Smoke at its best. Take cuttings. |
| August | Smoke fades. Leaves deepen in colour. |
| September | Autumn colour starts. |
| October | Peak autumn colour. |
| November | Leaves fall. Plant bare-root cotinus until March. |
| December | Check for dead or crossing branches. |
Cotinus autumn colour: why it rivals any Japanese maple
An unpruned cotinus in October. The leaves glow when the low sun shines through them.
Cotinus has some of the brightest autumn colour of any shrub. The leaves turn yellow, orange, scarlet and crimson over several weeks. Sunny days and cool nights make the colours even stronger.
That’s why it’s a favourite in lists of trees and shrubs for autumn colour. Left unpruned, it can grow as big as a small tree and rivals a Japanese maple for impact.
Which variety has the best autumn colour?
- ‘Grace’: Spectacular orange to deep scarlet.
- ‘Royal Purple’: Reliable scarlet-red, striking after the dark summer leaves.
- ‘Golden Spirit’: Lime-gold turning orange-red.
- ‘Young Lady’: Softer yellow and orange.
Tip: Don’t feed late in the season. Plants in lean, unfed soil colour up best.
How to propagate cotinus
Summer cuttings are the easiest way to get more plants. You can also layer a low branch. Named varieties don’t come true from seed.
Cuttings (July to August):
- Choose healthy side shoots of this year’s growth, 10-15cm long.
- Cut just below a leaf joint with a sharp knife.
- Strip the lower leaves, leaving a few at the top.
- Dip the end in rooting powder.
- Push into a mix of half perlite and half compost.
- Cover with a clear bag or propagator lid and keep warm.
- Pot up once roots fill the pot, usually after a couple of months.
Not every cutting will root, so take a few spares.
Layering (autumn):
In October, peg a low branch to the ground. Nick the underside lightly with a knife and cover with a little soil. Leave it for a year, then cut it free once it has roots.
Common problems with cotinus in the UK
Cotinus is mostly trouble-free. Most problems come down to where it’s planted.
Verticillium wilt is the one disease to know about. Branches suddenly wilt in summer, and the wood has brown streaks inside when cut. There’s no spray for it. Cut out and dispose of affected branches. The RHS verticillium wilt page has photos to help you spot it. Avoid planting where potatoes or strawberries have grown recently.
Dull leaf colour comes from shade, too much feed or wet soil. Give it more sun and stop feeding.
Wind damage can snap the long new shoots on hard-pruned plants. In a windy garden, leave it unpruned or give it some shelter.
Coral spot shows as small orange-pink dots on dead wood. Cut back to healthy wood. It only takes hold on wood that’s already dead or weak.
Bees and hoverflies visit the flowers too, so it’s a lovely addition to a bee-friendly garden.
Frequently asked questions
When is the best time to plant cotinus in the UK?
Plant between October and March while it’s dormant. Bare-root plants are best planted from November to February. Potted plants can go in any time, but autumn gives the roots a head start. Water weekly through the first summer.
Does cotinus grow well in clay soil?
Yes, cotinus is happy on clay. Just make sure the ground doesn’t sit waterlogged in winter. If your garden floods, plant on a raised mound of topsoil mixed with grit.
How fast does smokebush grow in the UK?
At a steady, moderate pace if left unpruned. It slowly builds into a big shrub or small tree. Plants cut back hard each year shoot up fast in summer, but you cut them down again the next spring.
Should I hard prune my cotinus every year?
No, it’s up to you. Cutting it hard each late winter gives bigger leaves but no smoky flowers. Leave it unpruned for the full smoky show in summer. Or cut it every other year and enjoy both.
Why has my smokebush lost its purple colour?
Usually too much shade or too much feed. Purple types need full sun to stay dark. Rich feed or fresh manure pushes green growth. Stop feeding and make sure it gets plenty of sun.
Is cotinus poisonous to dogs or cats?
There’s no clear answer, so play it safe. Don’t let pets chew it, and call your vet if one eats some and seems unwell. The sap can irritate skin, so wear gloves when you prune.
Can I grow cotinus in a container in the UK?
Yes, for a few years while it’s young. Use a pot at least 45cm wide and deep, filled with John Innes No.3 and some perlite. Cut it back each late winter to keep it small. Water often in summer and wrap the pot in hard frosts.
Our team produces practical UK gardening guidance from source research, contributor records and established horticultural practice. Editorial standards are overseen by Matt W.
