Prune Sumac – Suckers at the Soil Line

Prune Sumac – Suckers at the Soil Line guide illustration

Cut stray suckers at the soil line if you want one clump. A leggy colony can be cut to the ground every few years.

Pruning Sumac care summary diagram

Cut suckers at the soil line if you want one clump

FactorRecommendedAvoid
TimingLate winter while the plant is leafless, and any time for stray suckersDo not leave a stub at grade that resprouts
SuckersPull or cut just below the soilDo not paint a systemic on a sucker if you want the mother plant
RejuvenateCut a leggy colony to the ground every few yearsDo not tip-shear and call that a renewal
EdgeMow or cut the line you will keepDo not ignore suckers along a foundation

Colony kinds send stems from the roots. [1] [2] staghorn sumac and winged sumac share that sucker job. Site and water stay on How to Grow Sumac.

When should I prune sumac?

Cut dead wood in late winter while the plant is leafless. Cut stray suckers whenever they appear, just below the soil.

Should I remove suckers?

Yes if you want one clump. No if you want a bank or a screen. Cut them below the soil so a stub does not resprout.

How to prune sumac

  1. Wait until leaves are off if you are thinning the clump, so you can see the stems.
  2. Cut dead, broken, and crossing wood back to a healthy stem or to the ground.
  3. For stray suckers, pull soil back and cut just below grade. Refill so a stub does not resprout.
  4. Every few years, cut a tired colony to the ground if you want a flush of new stems. [3]
  5. Stop once the edge you keep is clear. Do not shear it like a hedge if you want the open outline.

A young plant needs almost no cut beyond broken wood. Wait until the clump is established before you start renewal cuts.

Dig a rooted sucker in spring

The easiest start is a rooted sucker, not seed. Dig in spring or fall while the plant is cool, keep some roots on the piece, and replant it at the same depth.

  1. Water the soil a few days before you dig, so the root ball holds together.
  2. Dig a few inches outside the sucker and lift it with roots attached.
  3. Replant at once at the same depth, and water to settle.

Let a colony fill a bank, or keep cutting the edge

Leave the suckers if you want a screen or erosion cover. Walk the edge and cut what crosses the line if you want one clump. [4] A hedge of winged sumac works only where the colony is allowed to spread. Fragrant stays lower, but it still sends new stems.

If a sucker crosses the line, cut it below the soil — do not leave a stub at grade.

FAQ

Can I start sumac from seed?

Seed is slow. Move a rooted sucker in spring, or buy a nursery plant for a named cutleaf.

Will cutting suckers make more of them?

Cutting a trunk to the ground can push new suckers. That is the renewal cut. At the edge, cut below the soil and keep walking the line.

Recommended plants

References

  1. [1] Ask Extension - https://ask.extension.org/kb/faq.php?id=906671
  2. [2] The Morton Arboretum - https://mortonarb.org/plant-and-protect/trees-and-plants/staghorn-sumac/
  3. [3] NC State Extension Gardener - https://plants.ces.ncsu.edu/plants/rhus-typhina/
  4. [4] PlantNative - https://plantnative.org/native-plants/staghorn-sumac-rhus-typhina.htm

This note is part of Rhus Guides.

More pruning timing notes by plant live in Pruning Guides.

Updated: Reviewed by Bosquelle Editors

This guide is written for real gardens, not perfect climates. Results vary with site, season, and plant choice. We draw on multiple sources and practical experience; treat the steps here as honest guidance, not a promise that every bed will behave the same.