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/green for hydroponic systems. EC 1.0-2.0 mS/cm. pH 5.5-7.0. Temperature: 10–25°C (cool to moderate; the flavor is mildest in cool weather). Low to moderate light (DLI 10-18 mol/m2/day; tolerates partial shade). Any hydroponic system works. From seed to first harvest: 6-8 weeks. From division of existing clump: immediately harvestable. Harvest young leaves by cutting at the base; the plant regrows continuously. The tart, lemony flavor adds brightness to dishes without adding liquid (unlike lemon juice). For sorrel soup: sweat a large quantity of sorrel in butter until it melts into a puree (it turns olive-brown, which is normal), add stock and cream, season. The soup can be served hot or cold. Remove flower stalks to keep the plant producing tender leaves rather than going to seed. A single sorrel plant provides more tart greens than a household typically needs.