What's eating my geranium macrorrhizum?

Geranium macrorrhizum is a tough, aromatic ground-cover cranesbill; its scented foliage deters many pests. Vine weevils remain the most damaging threat. Slugs occasionally attack young growth, and vine weevil grubs can undermine the thick rhizomes. Deer and rabbits generally avoid the strongly scented leaves.

Adults notch leaf margins; larvae feed on rhizomes and roots, causing sections of the plant to wilt and die Apply Steinernema kraussei nematodes in late summer to moist soil; remove adult beetles found sheltering at the crown at night

Irregular holes in young or freshly emerging leaves, particularly in damp spring weather Use ferric phosphate pellets around the planting area; hand-pick after dark; improve drainage to reduce habitat

Sticky residue and curled shoot tips from colonies feeding on sap; usually minor on this species Pinch off affected shoot tips; spray with insecticidal soap or neem oil if colonies persist