Herb-Robert

Geranium robertianum

Geraniaceae · herbaceous · introduced

Last updated March 15, 2026

Data Coverage 1 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

Threatens forest understory and native plant diversity in western Washington forests. Listed as a Class B noxious weed in Washington state.

— HortGuide editorial

Quick Facts

Origin

Europe, Asia, and Northern Africa