Holboell's Rockcress
Boechera holboellii
Also known as: Holboell's rockcress, dropseed rockcress, second rockcress
- Native to:
- Canada, Greenland, United States
Danielito2129
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Brassicaceae
- Genus:
- Boechera
- Species:
- Boechera holboellii
- USDA Symbol:
- ARHO2
Growth Characteristics
- Life Cycle:
- Biennial | Perennial
- Growth Habit:
- Forb/herb
- Height:
- 60 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- apr,may,jun,jul
- Bloom Colors:
- white, pink
Wildlife Benefits
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
California Marble (Euchloe hyantis), Paramidea lanceolata, Spring white (Pontia sisymbrii), Western white (Pontia occidentalis)
Garden & Ecology Notes
- Wildlife Value:
- butterflies
- Deer Resistant:
- Yes
Soil Requirements
- Soil Type:
- rocky, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- commonly found in rocky outcrops and slopes
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds germinate readily after cold stratification; surface sow on well-drained medium.
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI