Geranium × magnificum · Perennial
Vine weevil larvae: Apply nematodes in autumn or use a systemic insecticide drench.
Slugs and snails: Use slug pellets, beer traps, or hand-pick at night to reduce populations.
Powdery mildew: Improve air circulation and spray with a fungicide or milk solution if severe.
Geranium sawfly larvae: Hand-pick larvae or apply an insecticidal soap spray to control infestations.
Capsid bug: Monitor regularly and treat with a broad-spectrum insecticide if damage is significant.