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, Great Britain, 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:
- 90 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- apr,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
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:
- 14–30 days
- Notes:
- Seeds germinate after cold stratification; surface sow on moist soil.
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.