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Pruning guide · Perennial
Sneezeweed: when and how to prune
Helenium autumnale
Sneezeweed is best pruned in March and May.
| Pruning months | March and May |
|---|---|
| Flowering | July–October |
| Good for bees, butterflies and birds | Yes, for bees and butterflies |
| Native to Belgium | No, planted |
| Poisonous to people and pets | Yes, take care with children and pets |
Sneezeweed: when to prune it?
At the end of May cut back the stems, and in March remove last year’s dead stems.
Sneezeweed: how to prune it?
- At the end of May, cut all stems back by a third, just above a leaf: the plant stays shorter and sturdier and flowers a little later and for longer.
- If you cut back only half the stems, the plant flowers in two successive waves.
- In summer, cut faded flowers back to the next bud.
- Leave the dead stems over winter or cut them down in autumn; in March at the latest, before the new shoots appear.
How much to cut, and how often?
- There are 2 pruning periods a year: March and May. You don’t have to prune in every one.
What does it mean for wildlife?
- Sneezeweed flowers in July–October, when it attracts bees and butterflies.
Caution: Wear gloves: in sensitive people the sap can irritate the skin. Sneezeweed is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Sneezeweed · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.