Torrey's Blue Eyed Mary

Collinsia torreyi

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Plantaginaceae
Genus:
Collinsia
Species:
Collinsia torreyi

Growth Characteristics

Life Cycle:
Annual
Growth Habit:
Forb/herb
Height:
6 in - 1 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
mar, apr, may, jun, jul, aug
Bloom Colors:
Blue, Violet

Native Range

United States: California, Nevada, Oregon

Host Plant for Caterpillars

⚠️Edith's checkerspot (Euphydryas editha)

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Prefers open, rocky slopes and hillsides

Germination Information

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

Notes: Seeds require cold-moist stratification for optimal germination.

Source: OpenAI GPT-4o