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Pruning guide · Herb
Common comfrey: when and how to prune
Symphytum officinale
Common comfrey is best pruned in July and October.
| Pruning months | July and October |
|---|---|
| Flowering | May–July |
| Good for bees, butterflies and birds | Yes, for bees |
| Native to Belgium | Yes |
| Poisonous to people and pets | Yes, take care with children and pets |
Common comfrey: when to prune it?
After the first flowering, in July, you can cut the whole plant back. In October, clear away the dead leaves.
Common comfrey: how to prune it?
- After flowering, cut all stems and leaves back to 5 cm above the ground; new leaves appear within a few weeks.
- For the bumblebees, you can leave part of the clump standing and cut it back later.
- Cut off the flower stems before the seed ripens if you do not want seedlings.
- In October, clear the dead leaves or leave them as a mulch.
How much to cut, and how often?
- There are 2 pruning periods a year: July and October. You don’t have to prune in every one.
What does it mean for wildlife?
- Common comfrey flowers in May–July, when it attracts bees.
- If pruning falls during flowering, wait until it is over or leave part of the plant to flower, so bees and butterflies still benefit.
- As a native plant, it feeds more insects than a non-native species.
Caution: Wear gloves and long sleeves: the bristly hairs on leaves and stems can irritate the skin. Common comfrey is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Common comfrey · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.