Tolmie Star-Tulip
Calochortus tolmiei
- Native to:
- United States
Eric in SF





Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Liliaceae
- Genus:
- Calochortus
- Species:
- Calochortus tolmiei
- USDA Symbol:
- CATO
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Geophyte
- Height:
- 20 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun,jul
- Bloom Colors:
- white, lavender, purple
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
Garden & Ecology Notes
- Wildlife Value:
- bees, native pollinators
Soil Requirements
- Soil Type:
- well-drained, sandy or rocky soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to open, grassy hillsides and woodlands
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 21–60 days
- Notes:
- Seeds may take 2-3 years to germinate and reach flowering size. Bulbs develop slowly from seed.
The above propagation data sourced from Claude AI
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).; then Cold-moist stratification for 60 days.
Source: Claude AI
ORGHPS Germination Guide: Sow @ 4C for 3 weeks, then place @ 20C.