Deep Purple-Maroon Foliage and Smoky Plumes on a Bold Specimen Shrub

Royal Purple Smokebush (Cotinus coggygria 'Royal Purple') is the classic dark smokebush — rich, deep purple-maroon leaves all season, topped by airy, smoke-like purple-pink flower plumes in summer, finishing with brilliant red fall color. Large and dramatic, it makes a knockout specimen or backdrop. Whether you're anchoring a sunny border in Edina, creating a focal point in Woodbury, or building a bold-color screen in Maple Grove — Royal Purple brings season-long drama to zone 4b–5a yards.

Royal Purple Smokebush Plant Details

Royal Purple Smokebush Uses in Minnesota Landscapes

Specimen and bold backdrop

Its size and rich color make Royal Purple a commanding specimen or a dark backdrop that sets off lighter flowers and foliage in a sunny border in Edina or Plymouth.

Screens and large borders

Left unpruned it forms a substantial screen; a hard spring cutback keeps it shrubby with extra-large, dark leaves.

Tough, deer-resistant sites

Drought-tolerant and deer-resistant, it thrives in hot, dry, poor-soil spots where you want big color without fuss.

Best Time to Plant Royal Purple Smokebush in Minnesota

Fall (late August–early October) is the ideal planting window. Soil is still warm for root development, cool air reduces transplant stress, and the plant gets 6–8 weeks to establish roots before ground freeze (typically mid-November in the Twin Cities).

Spring (late April–May, after the ground thaws) is the second-best window, giving the shrub a full season to establish before its first winter.

Avoid summer planting (June–August) when possible. Never plant after mid-October or before late April — frozen ground or frost-heaving kills new roots.

How to Plant Royal Purple Smokebush

1. Dig wide, not deep — 2–3× the root ball width, same depth as the container.
2. Choose a sunny, well-drained spot for the darkest foliage; it tolerates poor, dry soil but dislikes soggy ground.
3. Backfill with native soil mixed with some compost; firm gently and water in well.
4. Give it room — 8–12 feet — as a specimen, or plan to prune for a smaller shrub.
5. Build a water basin the first season; flatten it before winter.
6. Mulch 2–3 inches with shredded bark, kept off the stems. For the biggest, darkest leaves, cut back hard in early spring (at the cost of some smoke plumes).

Watering Royal Purple Smokebush in Minnesota

First Year Watering Schedule

• Weeks 1–2: Every 2–3 days, deep and slow
• Month 1–2: Every 4–5 days
• Month 3–6: Every 7 days or less; it tolerates dry conditions well
• Stop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities metro).

After Year One

Established smokebush is drought-tolerant and needs water only during extended dry spells. It prefers lean, well-drained conditions over rich, wet soil.

Drip Irrigation in Minnesota

If used, place emitters 12–18 inches from the trunk; it needs less water than most shrubs. Always winterize the system — blow out the lines before freeze and shut timers off by early October.

How big does Royal Purple get?

Unpruned it can reach 8–12 feet as a large shrub or small tree; a hard spring cutback keeps it 4–6 feet with bigger, darker leaves.

How do I get more 'smoke'?

The smoky plumes form on older wood, so prune lightly for more smoke or cut back hard for boldest foliage — you trade one for the other.

Is it deer-resistant?

Yes — smokebush is generally passed over by deer.

Will it survive a Minnesota winter?

It's hardy to about zone 4. In the coldest, most open winters it may die back, then rebound vigorously on new growth.

You May Also Like

• Winecraft Black Smokebush — a compact, near-black smokebush for smaller spaces
• Grace Smokebush — a large hybrid with soft purple-red leaves and huge plumes
• Shop the full Three Timbers Minnesota catalog — zone 4-hardy plants hand-selected for Twin Cities yards