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Ask five gardeners to describe sorrel and you may get five different plants. One means the big, arrow-leaved clump that appears in early March and keeps the kitchen supplied until summer arrives properly. Another means the low, silvery mound of round leaves that shrugs off a dry August without complaint. Both are sorrels, both are good to eat, and both earn their space — but they behave quite differently. Here is how common sorrel and French sorrel compare, so you can choose the one that suits your soil, your cooking and your patience.
Common sorrel (Rumex acetosa) is the plant you will find in old meadows and along hedgerows. It is also sold as garden sorrel or broad-leaved sorrel. It grows upright and vigorous, with long, pointed leaves that narrow at the base into two distinctive backward-pointing lobes, and it crops hard in spring.
French sorrel (Rumex scutatus) is sometimes called buckler-leaved or shield-leaved sorrel, and the name describes it well. The leaves are small, rounded and slightly fleshy, held on a low, spreading plant. It looks neater, tastes gentler and copes better with dry ground.
Two others are worth knowing about. Red-veined sorrel (Rumex sanguineus) is grown mostly for its looks — the young leaves are edible, but they turn tough and bitter quickly. Sheep's sorrel (Rumex acetosella) is a creeping weed; pleasant enough in a foraged salad, but not something to invite into a veg bed.
Both taste of lemon and green apple, and both owe that tartness to oxalic acid. The difference lies in concentration and texture.
Choose common sorrel when you want the flavour to shout: a classic sorrel soup, a sharp sauce for salmon, a leaf that cuts through cream and butter. Choose French sorrel for salads, for sandwiches, and for anything where sorrel is a background note rather than the headline. Both lose most of their acidity when cooked, so taste as you go rather than following a recipe blindly.
Common sorrel makes a substantial clump, roughly 45–60cm across, with leaves 15–25cm long once established. From late spring it wants to flower, sending up slender stems that reach 60–90cm. Cut those out at the base as soon as you see them and the plant will keep producing tender leaves instead of seed. Left to its own devices, it self-seeds happily and can become a fixture — useful if you like it, tiresome if you don't.
French sorrel stays low, around 20–30cm tall, and spreads into a loose mat rather than a clump. The leaves are small, usually 5–8cm. It yields less per plant by weight, but it keeps going for longer, and its size makes it ideal for the front of a border, a gravel edge, a raised bed or a decent-sized pot.
Both are hardy perennials in a UK garden and will come through an average winter without protection. The real difference is what happens underfoot. Common sorrel is the tougher of the two in cold, heavy, wet soil. French sorrel hates sitting wet in winter: on clay it tends to sulk, rot at the crown or quietly dwindle. Put it in a raised bed with grit worked in, or in a pot of gritty compost, and it will be perfectly happy.
On sun and moisture, common sorrel is at its best in moisture-retentive soil in full sun or light shade, and it will still crop reasonably in part shade. French sorrel wants full sun, lean soil and sharp drainage, and once established it is notably drought-tolerant — one of the reasons it does so well in containers.
Neither needs feeding. Rich, heavily manured ground produces lush common sorrel that tastes flat and watery, so treat these plants as herbs rather than hungry vegetables. Common sorrel dies back to the crown in late autumn and reappears in February, which is one of its great pleasures. French sorrel usually keeps a rosette of leaves through winter and can be picked in mild spells.
Two practical points. First, cook sorrel briefly and late: it collapses in seconds and turns olive-green, and long cooking makes it drab and stringy. Second, use stainless steel, enamel or non-stick pans. Oxalic acid reacts with bare aluminium and uncoated cast iron, which can leave a metallic taste and mark the pan.
A sensible note on health: sorrel is high in oxalic acid, which is exactly why it tastes sour and why it is best eaten in normal culinary amounts rather than by the bucket. If you have kidney problems, a history of kidney stones, or you take warfarin or a similar blood-thinning medicine, speak to your GP or a dietitian before making it a daily habit.
Most keen cooks end up with both. If you would rather choose one, use these tests:
Sow seed in spring, or in early autumn if you have a sheltered spot, and thin or plant out to about 30cm apart for common sorrel and 20–25cm for French. Dividing an established clump in early spring or autumn is quicker and gives you a crop almost immediately. Water well in the first season, then leave them to it.
Harvest by picking the outer leaves and leaving the small central ones to grow on. Remove flower stems from common sorrel before the buds open. Lift and divide crowded clumps every three or four years to keep them productive. If you grow French sorrel in a pot, use a gritty mix, repot every couple of years, and never let it stand in a saucer of water over winter. Get those basics right and one plant will keep you in sharp, lemony leaves for years.
Photo: anfehoe / Pixabay
