Grand Collomia
Collomia grandiflora
Keith Edkins
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Polemoniaceae
- Genus:
- Collomia
- Species:
- Collomia grandiflora
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 3-4 ft
- Light Requirements:
- Part Shade
- Bloom Months:
- apr, may, jun, jul
- Bloom Colors:
- Orange, Yellow
Native Range
United States: Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming, Canada: British Columbia
Soil Requirements
- Soil Type:
- well-drained, sandy or rocky soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- prefers open, sunny locations
Germination Information
Pre-treatment: Seeds sown into a soil-less peat-based media (Sunshine #1) amended with micro-nutrients (Micromax) and slow release fertilizer (Osmocote 14-14-14). Placed in a walk-in cooler at 35-40 degrees for 4 weeks. No pre-treatment required for seeds stored under cool, dry conditions.
Establishment: Seed is collected when inflorescence begins to dry and capsules begin to open. Maturity usually occurs in late July or early August. Seeds are dark brown at this point. Entire plants are cut off at the base when top seeds shatter. Plants are placed in a screen-covered container and left to dry. Conflicting information on pre-treatment: one protocol suggests no pre-treatment required, another suggests a 4-week cold stratification.
Source: npn.rngr.net