How to grow sorrel
Overview
Sorrel (Rumex acetosa) is a hardy perennial herb grown for its tangy, lemon-flavoured leaves. It is a reliable kitchen garden plant that provides repeated harvests over many months. Key to success is keeping it well-watered in part shade and picking young leaves regularly to prevent bitterness.
Varieties
- Common Sorrel — The standard variety with broad, tangy leaves; reliable in all zones.
- French Sorrel — Smaller, more delicate leaves with a milder flavour; good for salads.
Soil Preparation
Sorrel prefers a slightly acidic to neutral soil (pH 6.0–7.0) that is rich in organic matter. Before planting, dig in well-rotted compost or aged manure. Ensure soil drains well but retains moisture; add sand or gypsum if heavy clay. A 5 cm layer of mulch after planting helps keep roots cool.
Growing Guide
Plant sorrel in rich, moist soil in a position that gets morning sun and afternoon shade. Space plants 30–40 cm apart. Sow seed 5 mm deep, or plant divisions in early spring (cool/temperate) or autumn (mediterranean/subtropical). Keep soil consistently moist but not waterlogged. Mulch around plants to retain moisture and suppress weeds. Remove flower stalks promptly to prolong leaf production.
Sowing
Sow sorrel seed 5 mm deep in seed trays or directly in the garden. Germination takes 7–14 days at 15–20°C. Thin seedlings to 30 cm apart. Direct sowing is easiest, but transplanting gives a head start in cooler zones. Keep soil moist during germination.
Care
Feed sorrel with a balanced liquid fertiliser (e.g., seaweed or fish emulsion) every 4–6 weeks during active growth. Apply a 2–3 cm layer of compost in spring and autumn. Divide clumps every 2–3 years in early spring to maintain vigour and prevent overcrowding.
Companion Planting
Sorrel grows well near strawberries, chives, and mint, which share similar moisture and light needs. Avoid planting near brassicas (cabbage, broccoli) as they may compete for nutrients and attract similar pests. Good as a border plant in the herb garden.
Common Pests & Risks
Slugs and snails are the main pests, especially in damp conditions. Use beer traps, crushed eggshells, or iron-based pellets. Leaf beetles (small, dark) may appear; handpick or spray with pyrethrum. Aphids can cluster on new growth; blast off with water or use neem oil.
Harvesting
Harvest sorrel leaves when they are young and tender, about 10–15 cm long, before they become tough and bitter. Pick regularly from the outside of the clump, leaving inner leaves to regrow. Cut back to 5 cm in late summer to encourage fresh autumn growth.
In the Kitchen
Use young sorrel leaves fresh in salads, or cook them in soups, sauces, and with fish. The leaves have a sharp, lemony flavour that works well as a substitute for lemon juice or vinegar. Store in a sealed bag in the fridge for up to a week, or freeze pureed leaves.
Troubleshooting
Yellow leaves: often due to overwatering or poor drainage; reduce watering and improve soil. Brown leaf edges: caused by dry conditions or too much sun; move to more shade and water regularly. Bitter leaves: from letting leaves grow too old or from heat stress; pick young leaves and provide afternoon shade. Bolting (flowering): remove flower stalks promptly to extend harvest; if plants bolt, cut back and let regrow. Slow growth: may indicate poor soil or lack of nutrients; feed with liquid fertiliser.