Sorrel
Rumex acetosa
Also known asGarden sorrel · Common sorrel · Spinach dock · Sour dock
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 3–9 (winter low around -40°C)
- Frost
- very hardy (survives deep cold)
- Season
- cool (spring/fall)
Growing systems
Root mass: moderate.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Rockwool (Mineral wool) | alkaline until pre-soaked | very high | low |
| Expanded clay pebbles (LECA) | neutral / inert | low | high |
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
| Net pot, no medium (Bare-root) | - | - | - |
| Soil-based mix (Potting soil) | varies | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (mS/cm) |
|---|---|---|---|---|
| seedling | 1 | 1 | 1 | 0.7 |
| vegetative | 3 | 1 | 2 | 1.5 |
Aquaponics suitability
Compatible
Fish waste provides enough nitrogen for healthy growth. Supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.
Care notes
An easy, long-lived perennial herb and green for hydroponic systems. EC 1.2-2.0 mS/cm. pH 5.5-7.0. Temperature: 10–24°C (cool to moderate; flavour is mildest in cool weather). Low to moderate light (DLI 12-18 mol/m2/day; tolerates partial shade). Any hydroponic system works. From seed to first harvest: 6-8 weeks; from division of an existing clump it is harvestable immediately. Harvest young leaves by cutting at the base and the plant regrows continuously. The tart, lemony flavour brightens dishes without adding liquid. For sorrel soup, sweat a large quantity in butter until it melts to a puree (it turns olive-brown, which is normal), then add stock and cream and season; it can be served hot or cold. Remove flower stalks to keep the plant producing tender leaves. One plant supplies more tart greens than most households need.