Giant Blue Eyed Mary
Collinsia grandiflora
Dianne Fristrom
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Plantaginaceae
- Genus:
- Collinsia
- Species:
- Collinsia grandiflora
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 1-2 ft
- Light Requirements:
- Part Shade
- Drought Tolerance:
- Low
- Bloom Months:
- apr, may, jun
- Bloom Colors:
- Blue, Purple
Native Range
United States: California, Idaho, Oregon, Utah, Washington, Canada: British Columbia
Host Plant for Caterpillars
⚠️Edith's checkerspot (Euphydryas editha)
Reported Fauna Sightings
Bees: Yellow bumble bee (Bombus fervidus), Yellow bumble bee (Bombus fervidus)
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- prefers open, sunny locations
Germination Information
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Notes: Seeds require cold-moist stratification for 30 days before germination.
Source: OpenAI GPT-4o