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Pruning guide · Annual
Rock isotome: when and how to prune
Isotoma axillaris
Rock isotome is best pruned in July.
| Pruning months | July |
|---|---|
| Flowering | June–September |
| Good for bees, butterflies and birds | Yes, for bees |
| Native to Belgium | No, planted |
| Poisonous to people and pets | Yes, take care with children and pets |
Rock isotome: when to prune it?
A light trim after the first flush of flowers, in July.
What else to prune in those months? July
Rock isotome: how to prune it?
- Cut the plant back by about a third with scissors, just above a leaf.
- Remove dead or yellowed stems.
- Then water and give a little flowering-plant feed for a new flush.
How much to cut, and how often?
- One pruning period a year: July.
What does it mean for wildlife?
- Rock isotome flowers in June–September, 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.
Caution: The milky sap irritates skin and eyes: wear gloves and wash your hands after cutting. Rock isotome is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Rock isotome · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.