Sulphur Buttercup
Ranunculus sulphureus
- Native to:
- Aleutian Is., Canada, Finland, Greenland, Kuril Is., Labrador, Norway, Russia, Svalbard, Sweden, United States
Anneli Salo
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Ranunculaceae
- Genus:
- Ranunculus
- Species:
- Ranunculus sulphureus
- USDA Symbol:
- RASU2
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Geophyte
- Height:
- 25 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- jun,jul,aug
- Bloom Colors:
- yellow
Keystone Species Ranking
- Pollen Specialist Bee Keystone:
- ★☆☆☆☆ Native pollen specialist bee species supported by this genus (NWF)
Soil Requirements
- Soil Type:
- rocky, well-drained, nutrient-poor soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- thrives in alpine and tundra regions
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 14–60 days
- Notes:
- Seeds require cold stratification; germination can be erratic. Light may improve germination rates.
The above propagation data sourced from Claude AI
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI