Hyssop
Hyssopus officinalis
Also known asTrue hyssop · Common hyssop · Hisopo · Isop
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 4–9 (winter low around -34°C)
- Frost
- very hardy (survives deep cold)
- Season
- warm (summer, frost-sensitive)
Growing systems
Root mass: moderate.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Expanded clay pebbles (LECA) | neutral / inert | low | high |
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
| Perlite (Expanded volcanic glass) | neutral / inert | very low | low |
| 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 | 0.6 |
| vegetative | 2 | 1 | 2 | 1.3 |
Aquaponics suitability
Not recommended
Fish waste alone doesn't supply enough of what this crop demands. Grows in hybrid systems with supplemental dosing, but expect active management.
Care notes
An easy, long-lived perennial herb for hydroponic or container growing. EC 1.0-1.8 mS/cm. pH 6.0-8.0 (tolerates alkaline conditions). Temperature: 10–28°C (Mediterranean; cold-hardy to USDA zone 4). Full sun (DLI 16-22 mol/m2/day). Well-drained media (the plant is drought-tolerant and dislikes waterlogged roots). Growth is moderate. Harvest stem tips with leaves and flower buds. The flowers are edible, beautiful blue-violet, and make an attractive garnish. For tea, dry leaves and flower tops at 35–40°C. Use sparingly in cooking because the flavor is potent: a few leaves in a pot of white beans, or chopped fine as part of a herb blend for lamb. Propagation by stem cuttings, division, or seed. Prune in spring to maintain compact shape and prevent the woody base from becoming bare. The plant attracts pollinators vigorously; in a greenhouse, flowering hyssop helps with pollination of nearby fruiting crops. A low-maintenance, long-lived herb that earns its space through versatility and pollinator support.