Wood sorrel

Common wood sorrel (Oxalis acetosella L.) is a herbaceous perennial plant belonging to the Oxalidaceae family. Known for its distinct tangy taste, it is often referred to as "sour trefoil" or "cuckoo bread," reflecting its culinary history and woodland distribution.

The plant is native to the forest zones of Eurasia, flourishing in temperate climates. It typically occupies the understory of coniferous and deciduous forests, preferring moist, shady habitats where it can establish large colonies as a ground cover.

Botanically, it is characterized by creeping rhizomes and clover-like trifoliate leaves. One of its most fascinating features is nyctinasty, where the leaves fold down during the night or when exposed to direct sunlight or mechanical stimulation. The flowers are delicate, solitary, and white with subtle purple veins.

In terms of cultivation, wood sorrel is a shade-loving species that demands consistently moist, acidic, and humus-rich soil. It is highly sensitive to desiccation and direct solar radiation, making it an ideal candidate for rock gardens, fern gullies, or forest-themed landscapes rather than open field agriculture.

Regarding its utility, wood sorrel is valued in traditional medicine for its diuretic, antiseptic, and antiscorbutic properties due to its vitamin C content. However, due to the high concentration of oxalic acid, it should be consumed in moderation to prevent potential interference with calcium absorption.

• High Vitamin C concentration
• Shade-tolerant foliage
• Rapid propagation via rhizomes
• Sensitivity to heavy fertilizers