Apiaceae
Perideridia gairdneri subsp. gairdneri
Perideridia gairdneri subsp. gairdneri
Also known as Edosmia montana, Peucedanum triternatum, Carum garrettii, Edosmia gairdneri
Flowering Plants · Native Plants · California Native · Yampah · Apiaceae · Perennial Wildflower · Ethnobotanical · Perideridia · Meadow Plant · Rare · Native Restoration · Edible Root
Gairdner's yampah (typical subspecies) is a delicate California native perennial in the carrot family, adapted to moist, seasonally wet meadows and open slopes. It performs best in partial shade with consistently moist, well-drained soil that mirrors its native California habitat. Extremely rare in cultivation, it is best suited for native plant specialists, restoration projects, or ethnobotanical collections.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water moderately to maintain evenly moist soil during active growth; reduce frequency when plant goes dormant in summer · Every 7-14 days
- Maintenance
- Moderate
- Soil
- loam
- Soil pH
- 6–7.5
- Temperature
- -40°F to 95°F
- Cycle
- Perennial
Hardiness
USDA 3a-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 4 ft
- Spread
- 3 ft
- Spacing
- 10 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Fine
Ecology & origin
Where it belongs and what it brings
- Native to
- California
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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