Herb · Polygonaceae
Garden Sorrel
Rumex acetosa
Keep cutting the young leaves and garden sorrel rewards you with wave after wave of tart, lemony pickings.
Full sun
Every 3–7 days
30–75°F · -1–24°C
60–90 days
Overview
Garden sorrel is a hardy perennial that pays you back in bright, lemon-sharp leaves. It hails from the dock family and gardeners have been reaching for it for centuries, prizing it as one of the very first fresh greens to break through in spring. Where tender salads fold at the first chill, sorrel powers right on through and keeps growing.
That zingy, sour kick is the real draw. It springs from the oxalic acid packed into the leaves, the same tang that gives sorrel its lemony punch and the cue to eat it in moderation. Young leaves come up mild and tender, older ones toughen and sharpen, so the winning move is to keep cutting early and cutting often.
Best of all, sorrel makes it almost too easy. Hand it moist, fertile soil and a bit of sun, stay on top of the flower stalks, and one clump keeps cropping for years before it ever asks to be divided.
Care
The short version: plant sorrel in full sun to light shade, keep the soil steadily moist, and give it rich, well drained ground. Keep harvesting the outer leaves and pinch out flower stalks as they climb, and the leaves stay tender while the plant keeps pumping out more.
Light
Sorrel powers ahead in full sun, yet it happily takes partial shade too, and a little shade is a real bonus where summers scorch, since it reins in the dash to bolt. Steer clear of deep shade, though, or the leaves come up thin and sparse.
Water
Keep the soil evenly moist, watering every 3 to 7 days and stepping it up in dry spells. That steady moisture is the trick to tender leaves, and it also fends off the early flowering that would sour them, so keep it coming.
Soil
Set sorrel into fertile, well drained loam loaded with organic matter and it takes off. It leans slightly acidic, around a pH of 5.5 to 6.8, but it is a relaxed grower that will get going in most decent garden soil.
Temperature
Cool to mild weather is where sorrel shines, roughly 30°F to 75°F (-1°C to 24°C), and it laughs off a light frost. Full summer heat is what tips it into bolting, so spring and autumn are its peak seasons for leaf.
Humidity
Everyday garden air keeps sorrel happy, somewhere around 40% to 70%, and this is one number you can forget about. Give it good airflow and the foliage stays in great shape, far more than any humidity reading ever manages.
Feeding
Feed in spring with a balanced or nitrogen-rich fertilizer, or pile on a compost top-dressing, to drive fresh leaf. One feed a season is plenty to keep a leaf crop charging along, so no need to overdo it.
Pruning
Harvest the outer leaves often, because sorrel is a champion cut-and-come-again crop, and pinch out flower stalks the instant they show to keep the leaves tender. Once it flowers, cut the whole plant back hard and it comes roaring back with a fresh flush of foliage.
Repotting
A clump cranks along for 3 to 4 years before the middle crowds up and loses steam. When the center fades and the leaves shrink, lift and divide it to fire the planting back up.
Size & spacing
Plants shoot up to around 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 bulk out and air can rush through.
When to plant
Sorrel is cold-hardy and springs into action early, which is exactly what an eager grower wants. Fire up seed indoors in late winter, or sow it straight outside the moment the soil can be worked, and from there the cutting runs right 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
Good news: sorrel barely puts a foot wrong, and what does crop up almost always lands on the leaves. A pest or two and the summer sprint to flower cause nearly all of it. Spot your symptom below, jump on it early, and the plant bounces right back.
Tall reddish stalks rocket up and the leaves turn sour
Crank up the heat and stretch out the days and sorrel launches into bolting, hurling its energy into a flower stalk instead of fresh leaves. The moment it does, the foliage toughens and turns sharp and bitter. Snip those stalks off the second they appear and shear the plant back hard, and it fires up a fresh flush of tender basal leaves.
Fix:
- Cut off flower stalks promptly
- Shear plant back to encourage fresh basal leaves
Pale, twisting trails carved across the leaves
Those squiggly lines are the handiwork of leaf miner grubs, the larvae of a small fly that burrow between the top and bottom of a leaf. Hold one to the light and the grub or its specks show up right inside the trail. Strip off the mined leaves and bin them, then clear out any wild dock nearby, because that is the launch pad these pests come from.
Fix:
- Pick off and destroy mined leaves
- Remove nearby wild docks that host the pest
Curling, sticky new growth swarming with little insects
Those soft green or black specks piling onto the newest leaves are aphids, and they are busy draining the sap. Flip the leaves to scout the undersides for colonies, then blast them off with a hard jet of water. If they charge back, hit them with insecticidal soap, and dialing back the nitrogen turns the plant into a far less tempting target.
Fix:
- Spray off with a strong jet of water
- Apply insecticidal soap if persistent
Toxicity
Here is where sorrel lands. For people it is a genuine edible green in everyday kitchen amounts, though the leaves are loaded with oxalic acid, so big helpings need a lighter hand and pets should stick to a nibble. The one to really watch is grazing livestock, which can pack away enough to make themselves ill.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Mild
A quick nibble hardly ever bothers a cat, but one that tucks into a real mouthful of the sour leaves might drool, paw at its mouth, or bring it back up. Keep it to the odd taste and all is well.
Dogs Mild
Most dogs breeze past a leaf or two no problem. Load up on the oxalate-rich foliage, though, and a dog can end up drooling, off its food, or nursing a loose, queasy stomach for a while.
Horses Mild
A horse grazing a little sorrel is perfectly fine. The catch is quantity over time, since the oxalates can rattle the gut and, eaten in real bulk, put pressure on the kidneys.
Rabbits Mild
Hand a rabbit sorrel only as a small, now-and-then green. That tangy oxalate load means a big serving can trigger soft stools or a mild upset, so never let it dominate the greens on the menu.
Livestock Moderate
This is the big one to watch. Cattle, sheep, and goats that graze hard on Rumex foliage can take on enough soluble oxalate to bring on weakness, gut trouble, and, in bad cases, kidney damage.
Birds Mild
A peck at the leaves is unlikely to bother hens or other poultry, but with all that oxalic acid, it is not a green to serve up in any real amount.
People Edible in moderation
Sorrel is a fantastic tangy green for salads and soups, and a culinary helping is totally safe to eat. Since the leaves run high in oxalic acid, just 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
The plain garden species is what most growers plant, and it delivers, but a couple of standout selections are well worth hunting down for less bolting or a flashier leaf.
Rumex acetosa 'Profusion'
A nearly seed-sterile selection that hardly ever bolts, so it keeps pumping out tender leaves long after ordinary sorrel has shot up and set seed.
Blood-veined sorrel (often sold as a sorrel form)
Green leaves streaked with bold deep red veins, striking enough to earn a spot in the salad bowl and the ornamental bed alike.
How to propagate
Multiplying sorrel is a breeze, so go for it, whether you tear open a seed packet or split a clump that is already thriving.
SeedEasy
Spring, after the last hard frost or started indoors 6-8 weeks earlier · 60-90 days to a harvestable plant
Kick sorrel off from seed, sowing it shallow into moist, fertile soil in spring or firing it up indoors 6 to 8 weeks before the last frost. Thin the seedlings so each clump has room to power out, and you will be cutting leaves within 60 to 90 days.
DivisionEasy
Early spring or autumn · A few weeks once divisions root and resume growth
Splitting an established clump is a quick win in early spring or autumn. Lift it, pull or cut it into chunks that each keep roots and a growing point, then replant. The divisions dig in within a few weeks, perking up a tired plant and handing you free ones.
Myths
Sorrel is poisonous and should stay off your plate for good.
Not a chance. Sorrel is a traditional edible green that people have eaten for centuries, and a normal serving is completely safe. The only genuine catch is its high soluble-oxalate content, which makes big raw quantities a concern for anyone prone to kidney stones and for livestock grazing it hard. Eat it in moderation and it belongs right on your plate, not on any poison list.