Photo: Wikimedia Commons, CC BY-SA 3.0 · source
Pruning guide · Annual
Zonal geranium: when and how to prune
Pelargonium × hortorum
Zonal geranium is best pruned in February–March and October.
| Pruning months | February–March and October |
|---|---|
| Flowering | May–October |
| Native to Belgium | No, planted |
| Poisonous to people and pets | Yes, take care with children and pets |
Zonal geranium: when to prune it?
Prune in October, before bringing the plants in, and again in February–March, before new growth starts. Pinch out young seedlings and cuttings in March.
What else to prune in those months? February · March · October
Zonal geranium: how to prune it?
- On young plants, pinch out the tips of the stems: they branch and become bushier.
- In October, shorten all stems by a third and remove flowers and buds.
- In February–March, cut back further to 10–15 cm, just above a leaf or bud.
- Remove thin, weak and diseased stems completely.
How much to cut, and how often?
- There are 2 pruning periods a year: February–March and October. You don’t have to prune in every one.
What does it mean for wildlife?
- Don’t cut more than you need to: what stays standing gives insects and birds food and shelter.
Caution: Do not prune in full summer flower: you lose weeks of blooms. Removing faded flower heads is enough. Zonal geranium is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Zonal geranium · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.