Sheep Sorrel (Rumex acetosella): Tangy, Arrowhead Leaves of Acidic Soils

Overview

Sheep sorrel (Rumex acetosella), also called red sorrel or sour weed, is a perennial herb with a creeping rootstock, forming patches of arrowhead-shaped, green leaves often tinged red. Tiny, reddish flowers appear on slender stalks in early summer. The leaves have a sharp, lemony flavor due to oxalic acid.

Botanical Details

• Family: Polygonaceae (buckwheat family)
• Genus: Rumex
• Species: acetosella
• Synonym: Acetosella vulgaris

Ecology & Uses

Thrives in acidic, sandy, or gravelly soils; indicator of low pH. Spreads aggressively by rhizomes and seed. Young leaves used sparingly in salads, soups, sauces (like sorrel). High oxalic acid—avoid large quantities, especially for those with kidney stones. Difficult to eradicate; improve soil fertility and pH to discourage.