Valley Mayweed
Matricaria occidentalis
- Native to:
- Mexican Pacific Is., Mexico, United States
Alex Heyman (www.inaturalist.org)

Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Matricaria
- Species:
- Matricaria occidentalis
- USDA Symbol:
- MAOC
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 30 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun,jul,aug
- Bloom Colors:
- white, yellow
Garden & Ecology Notes
- Wildlife Value:
- insects
- Deer Resistant:
- Yes
- Salt Tolerant:
- Yes
- Fragrant:
- Yes
Soil Requirements
- Soil Type:
- moist, well-drained sandy loam
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- consistently moist
- Notes:
- commonly found in wet meadows and stream banks
Propagation & Germination
- Stratification:
- None required
- Germination Time:
- 7–21 days
- Notes:
- Seeds require light for germination; surface sow and do not cover.
The above propagation data sourced from Claude AI