hairy rockcress
Arabis hirsuta
Also known as: hairy rockcress, mountain rockcress
- Native to:
- Albania, Algeria, Austria, Baltic States, Belgium, Bulgaria, China, Corse, Czechia-Slovakia, Denmark, Finland, France, Germany, Greece, Hungary, Iran, Iraq, Ireland, Italy, Japan, Kazakhstan, Korea, Krym, Kuril Is., Morocco, Netherlands, Norway, NW. Balkan Pen., Poland, Portugal, Romania, Russia, Sardegna, Sicilia, Spain, Sweden, Switzerland, Transcaucasus, Türkiye, Türkiye-in-Europe, Ukraine, United States
Ivar Leidus
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Brassicaceae
- Genus:
- Arabis
- Species:
- Arabis hirsuta
- USDA Symbol:
- ARHI
Growth Characteristics
- Life Cycle:
- Annual | Biennial | Perennial
- Growth Habit:
- Forb/herb
- Height:
- 60 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun,jul
- Bloom Colors:
- white
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Large Marble (Euchloe ausonides)
Garden & Ecology Notes
- Wildlife Value:
- butterflies, bees
- Deer Resistant:
- Yes
Soil Requirements
- Soil Type:
- dry, calcareous, well-drained soil
- pH:
- 6.0 - 8.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- often found on limestone or chalky substrates
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 7–21 days
- Notes:
- Seeds require light for germination; surface sow or lightly cover. Cold stratification improves germination uniformity.
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
ORGHPS Germination Guide: Sow @ 20C. Germinates within 3 months.