American Rockbrake

Cryptogramma acrostichoides

Taxonomy

Division:
Pteridophyta | - Ferns
Family:
Pteridaceae
Genus:
Cryptogramma
Species:
Cryptogramma acrostichoides

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
1-2 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Ground Cover:
Yes

Native Range

United States: Alaska, Arizona, California, Colorado, Idaho, Michigan, Montana, New Mexico, Nevada, Oregon, South Dakota, Utah, Washington, Wyoming, Canada: Alberta, British Columbia, Manitoba, Northwest Territories, Ontario, Saskatchewan, Yukon

Soil Requirements

Soil Type:
rocky, well-drained, nutrient-poor soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
prefers rocky crevices and slopes

Germination Information

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: OpenAI GPT-4o