Mexican oregano
Lippia graveolens
Also known asOregano cimarrón · Hierba dulce · Sonoran oregano · Puerto Rican oregano · Redbrush lippia · Scented lippia
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 8–11 (winter low around -12°C)
- Frost
- frost sensitive (dies at first frost)
- Season
- warm (summer, frost-sensitive)
Growing systems
Root mass: heavy. Thin-channel systems can't hold this crop.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Perlite (Expanded volcanic glass) | neutral / inert | very low | low |
| Soil-based mix (Potting soil) | varies | high | high |
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
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 | 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
A drought-tolerant herb for warm, well-drained conditions. Container growing (15 L) with well-drained media (perlite, pumice). EC 1.0-1.8 mS/cm. pH 6.0-7.5. Temperature: 18–35°C (heat-loving; frost kills the plant). Full sun (DLI 16-25 mol/m2/day). The plant grows as a woody sub-shrub and can be maintained as a container herb for years with annual pruning. Harvest by stripping leaves from stems or cutting branch tips. The leaves are most flavorful when dried: air-dry whole branches, then crumble the dried leaves and store in sealed jars. Fresh Mexican oregano can also be used, but the flavor intensifies and improves with drying. For growers who cook Mexican food, having the correct oregano makes a measurable difference in the authenticity of chili, enchilada sauce, and salsa. Mediterranean oregano is not a substitute; the flavor profiles are distinct. Seeds and plants are available from herb specialists and some Mexican seed suppliers.