Photo: NicolasDuval15, CC BY-SA 4.0 · source
Pruning guide · Perennial
Fernleaf yarrow: when and how to prune
Achillea filipendulina
Fernleaf yarrow is best pruned in March and July–August.
| Pruning months | March and July–August |
|---|---|
| Flowering | June–September |
| 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 |
Fernleaf yarrow: when to prune it?
Cut off faded flower heads in July–August, and last year’s old stems in March.
Fernleaf yarrow: how to prune it?
- In summer, cut faded heads back to just above a leaf or side bud: new flowers often follow.
- Leave the last heads standing in autumn: they look good in winter.
- In March, cut all old stems down to just above the new leaves at the base.
- For the vase or for drying, cut when the heads are fully open and firm.
How much to cut, and how often?
- There are 2 pruning periods a year: March and July–August. You don’t have to prune in every one.
What does it mean for wildlife?
- Fernleaf yarrow flowers in June–September, when it attracts bees and butterflies.
- If pruning falls during flowering, wait until it is over or leave part of the plant to flower, so bees and butterflies still benefit.
Caution: Wear gloves if you have sensitive skin: the sap can irritate. Fernleaf yarrow is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Fernleaf yarrow · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.