Purging flax (Linum catharticum) is a small annual herb of grassland, dunes and moors across Europe, most commonly on calcareous soils. It has a long history of use as a gentle herbal laxative.1 Inputs Full sun1 Moist soil1 Outputs Medicinal use1 Type Herb Annual Footnotes Linum catharticum | Plants for a Future ↩ ↩2 ↩3 ↩4