Herb · Polygonaceae
Garden Sorrel
Rumex acetosa
Cut it young and often and garden sorrel keeps a steady supply of tangy, lemony leaves coming from spring to frost.
Full sun
Every 3–7 days
30–75°F · -1–24°C
60–90 days
Overview
Garden sorrel is a hardy perennial grown for its bright, lemon-sharp leaves. It belongs to the dock family and has been picked from gardens and meadows for centuries, long valued as one of the first fresh greens of spring. Where many salad plants wilt at the first cold snap, sorrel shrugs it off and keeps growing.
The flavor is the whole point. That clean, sour tang comes from the oxalic acid in the leaves, the same compound that gives the plant its tart bite and asks you to eat it in moderation. Young leaves are mild and tender; older ones turn tougher and more bitter, which is why you cut early and cut often.
It is about as forgiving a plant as a kitchen garden offers. Give it moist, fertile ground and a bit of sun, keep the flower stalks cut, and a single clump will feed you for years before it needs dividing.
Care
The short version: full sun to light shade, steady moisture, and rich, well drained soil. Harvest the outer leaves often and snip off flower stalks as they rise to keep the leaves tender and the plant productive.
Light
Sorrel does best in full sun but takes partial shade without complaint, and a little shade is welcome where summers run hot since it slows the rush to bolt. In deep shade the leaves grow thin and sparse.
Water
Keep the soil consistently moist, watering every 3 to 7 days and more in dry spells. Even moisture is what keeps the leaves tender and holds off the early flowering that turns them bitter.
Soil
Plant in fertile, well drained loam with plenty of organic matter worked in. Sorrel likes the soil slightly acidic, around a pH of 5.5 to 6.8, but it is not fussy and grows in most decent garden ground.
Temperature
It thrives in cool to mild weather, roughly 30°F to 75°F (-1°C to 24°C), and survives light frost easily. Real summer heat is what drives it to bolt, so it is happiest in spring and autumn.
Humidity
Ordinary garden air suits it, somewhere around 40% to 70%, and there is no need to fuss over a number. Good airflow keeps the foliage healthy far more than any humidity reading.
Feeding
Feed in spring with a balanced or nitrogen-rich fertilizer or a top-dressing of compost to push leafy growth. One feed a season is usually plenty for a plant grown for its leaves.
Pruning
Harvest the outer leaves often as a cut-and-come-again crop, and snip off flower stalks the moment they appear to keep the leaves tender. After flowering, cut the whole plant back hard and it pushes out a fresh flush of foliage.
Repotting
A clump runs strong for 3 to 4 years before the center crowds and slows. When the middle declines and the leaves shrink, lift and divide it to renew the planting.
Size & spacing
Plants reach about 12 to 24 inches (30 to 60 cm) tall and spread 12 to 18 inches (30 to 45 cm) wide. Give each clump that much room so it can fill out and air can move through.
When to plant
Sorrel is cold-hardy and gets going early. Start seed indoors in late winter or sow straight into the ground as soon as the soil can be worked in spring, then cut leaves through the season until frost.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: 6-8 weeks before last spring frost
- Plant: Early spring as soon as soil can be worked; cold-hardy and tolerates light frost
- Harvest: Cut outer leaves young and often through the growing season; remove flower stalks to keep leaves tender and mild
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
Sorrel has few real problems, and most show up on the leaves. A couple of pests and the summer rush to flower cause nearly all of it. Match what you see below and step in early.
Tall reddish stalks shoot up and the leaves turn sour
Heat and long summer days push sorrel into bolting, where it pours its energy into a flower stalk instead of fresh leaves. Once that happens the foliage toughens and turns bitter. Cut the stalks off the moment they appear and shear the plant back hard, and it will throw up a flush of tender basal leaves again.
Fix:
- Cut off flower stalks promptly
- Shear plant back to encourage fresh basal leaves
Pale winding trails snaking through the leaves
This is the work of leaf miner larvae, the maggots of a small fly that tunnel between the upper and lower surfaces of the leaf. Hold a leaf to the light and you can see the grub or its droppings inside the trail. Pick off and bin the mined leaves, and clear out any wild dock growing nearby, since that is where the pest comes from.
Fix:
- Pick off and destroy mined leaves
- Remove nearby wild docks that host the pest
Sticky, curled new growth crawling with tiny insects
Those soft green or black specks are aphids, and they cluster on the youngest leaves to suck the sap. Check the undersides for colonies, then knock them off with a hard jet of water. If they keep coming back, a spray of insecticidal soap clears them, and easing off the nitrogen feed makes the plant less of a target.
Fix:
- Spray off with a strong jet of water
- Apply insecticidal soap if persistent
Toxicity
Sorrel sits in an easy middle ground. The leaves are a genuine edible green for people in normal kitchen amounts, but they carry plenty of oxalic acid, so large helpings deserve restraint and animals should only nibble. The one real warning is for grazing livestock, which can eat enough to make themselves ill.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A nibble rarely causes trouble, but a cat that eats a good mouthful of the sour leaves may drool, paw at its mouth, or bring the meal back up. Keep it to an occasional taste.
Dogs Mild
Most dogs shrug off a leaf or two. A bigger helping of the oxalate-rich foliage can leave one drooling, off its food, or with a loose, queasy stomach for a while.
Horses Mild
A horse that grazes a little sorrel is fine. The worry is volume over time, since the oxalates in the leaves can upset the gut and, eaten in real quantity, strain the kidneys.
Rabbits Mild
Offer sorrel only as a small, now-and-then green. The tart oxalate load means a large serving can cause soft stools or mild digestive upset, so it should never make up the bulk of a rabbit's greens.
Livestock Moderate
This is where the real caution lies. Cattle, sheep, and goats that graze heavily on Rumex foliage can take in enough soluble oxalate to bring on weakness, gut upset, and kidney damage in bad cases.
Birds Mild
A peck at the leaves is unlikely to harm hens or other poultry, but the high oxalic acid means the foliage is not a green to feed in any quantity.
People Edible in moderation
Sorrel is a prized tangy salad and soup green, and a culinary helping is perfectly safe to eat. Because the leaves are high in oxalic acid, go easy on big raw servings, especially if you are prone to kidney stones.
Consume sorrel in moderation; the high soluble-oxalate content is a concern in large quantities, particularly for grazing animals.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
Most sorrel sold is the plain garden species, but a few selections are worth seeking out for less bolting or a prettier leaf.
Rumex acetosa 'Profusion'
A nearly seed-sterile selection that rarely bolts, so it keeps handing you tender leaves long after ordinary sorrel has run to seed.
Blood-veined sorrel (often sold as a sorrel form)
Green leaves laced with deep red veins that earn it a spot in salads and ornamental beds alike.
How to propagate
Sorrel is simple to multiply, whether you raise it from a seed packet or split a clump you already grow.
SeedEasy
Spring, after the last hard frost or started indoors 6-8 weeks earlier · 60-90 days to a harvestable plant
Most gardeners start sorrel from seed, sowing shallowly into moist, fertile soil in spring or indoors 6 to 8 weeks before the last frost. Thin the seedlings so each clump has room to fill out, and you can be cutting leaves within 60 to 90 days.
DivisionEasy
Early spring or autumn · A few weeks once divisions root and resume growth
An established clump is easy to split in early spring or autumn. Lift it, pull or cut it into sections each with roots and a growing point, and replant. The divisions settle in within a few weeks and both refresh a tired plant and give you free new ones.
Myths
Sorrel is poisonous and should never be eaten.
Sorrel is a traditional edible green that people have eaten for centuries, and a normal culinary serving is safe. The only real catch is its high soluble-oxalate content, which makes large raw quantities a concern for anyone prone to kidney stones and for livestock that graze it heavily. Eaten in moderation, it belongs on the plate, not on a poison list.