Shasta Knotweed
Polygonum shastense
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Polygonaceae
- Genus:
- Polygonum
- Species:
- Polygonum shastense
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub , Subshrub
- Height:
- 1-2 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- jul, aug, sep
- Bloom Colors:
- White, Pink
- Ground Cover:
- Yes
Native Range
United States: California, Nevada, Oregon
Reported Fauna Sightings
Bees: Yellow-faced bumble bee (Bombus vosnesenskii), Yellow-faced bumble bee (Bombus vosnesenskii)
Soil Requirements
- Soil Type:
- rocky, well-drained, nutrient-poor soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to mountainous regions with sparse vegetation
Germination Information
Pre-treatment: Seeds are placed into fine mesh bags and soaked in a 1% hydrogen peroxide (3:1 water/3% hydrogen peroxide) for 24 hours, then rinsed and placed in water for an additional 24 hours. Seeds are layered in peat and placed into cold stratification (33.8 to 37.4 °F) for 60 days. Check seeds in peat weekly and treat with 1% hydrogen peroxide if mold is evident.
Source: npn.rngr.net