Rumex acetosa Seeds | Sorrel
LATIN NAME: Rumex acetosa
COMMON NAME: Sorrel
Plant Profile
Sorrel belongs to the buckwheat family, Polygonaceae, the same group that gives us rhubarb and the ornamental docks. Within that family it is the genus Rumex that specialises in sour, acid-loving foliage, and garden sorrel is the most kitchen-friendly member of the clan.
The leaf is the giveaway: a long, narrow arrowhead, pointed at the tip and lobed at the base, the shape botanists call sagittate. What is far less obvious is that sorrel is dioecious, meaning individual plants are either male or female, and the species carries one of the best-studied sex-chromosome systems among flowering plants, with separate X and Y types sorting out which flower a plant will bear. A bed of sorrel is therefore a small population of two kinds, not a single uniform crop.
Wild sorrel favours damp, grassy places and the edges of fields and streams across temperate Europe and Asia. Medieval and Tudor gardeners valued it enough to give it a permanent place in the herb border, and it travelled with settlers to North America, where it now grows as a naturalised perennial in cooler regions.
Science & Biotechnology
The sour taste is mostly soluble oxalate, present as potassium oxalate in the cell sap. Alongside it sorrel carries anthraquinone derivatives such as rumicin and nepodin, plus tannins and a useful load of vitamin C and the flavonoid rutin. The oxalate is also the reason for a single, firm caution: people prone to kidney stones, and anyone eating very large quantities of the leaves, should treat sorrel as a condiment rather than a vegetable, because excess oxalate binds calcium and can stress the kidneys. A little, cooked or raw, is the traditional and safe measure.
Rutin, a flavonoid that helps maintain small blood vessels, is one of the compounds that made sorrel a spring tonic in older herbal practice. In Germany it is one of the seven fresh herbs of Frankfurter Grune Sosse, the cold green sauce served with potatoes and boiled eggs, and that single regional dish probably keeps more sorrel in cultivation than any seed catalogue does.
Uses & Benefits
The classic use is a creamy sorrel soup, soupe aux sorrel, where the leaves are wilted into stock and cream and the oxalate turns the liquid a vivid pink as it meets the dairy. Young leaves go into salads for a lemony bite, and a fistful stirred into a bechamel or a fish sauce cuts richness without a lemon press. Because the acid is strong, sorrel is almost always a supporting player; a little transforms a dish, a lot overwhelms it.
Sorrel loses its brightness when dried, so the reliable way to keep it is to blanch and freeze the leaves, or to pack a pesto-like puree into ice trays. The frozen puree keeps the colour and the tang through the winter and can be stirred straight into soup.
Growing from Seed
Sorrel is a long-lived perennial that is easy to start. Sow the seed on the surface of moist, fertile ground in spring or again in late summer, press it in lightly, and keep the bed evenly damp until the seedlings stand. Once they are up, the plants ask for little beyond a moist root run and a cut now and then.
When seedlings show their third or fourth true leaf, thin them so each crown has room to spread, leaving roughly thirty centimetres between plants. Sorrel rewards a mulch of compost around the base and a drink in dry weather; cut the outer leaves with scissors rather than pulling the crown, and a single planting will crop for several seasons.
Our Take
If you grow only one sour leaf, make it sorrel, and plant it where the morning sun hits but the soil never bakes. I lift a few leaves every time I pass, and the plant only thanks me by sending more. Keep it away from the stone-prone members of the household in large doses, and treat it as a seasoning, not a side dish. For the wider dock family, the links to sheep sorrel, patience dock and buckwheat are worth a read.
Related Reading
Continue exploring with these related plants: