Hairy Gumweed
Grindelia hirsutula
Also known as: Sharpleaf Gumweed
Franco Folini from San Francisco, USA
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Grindelia
- Species:
- Grindelia hirsutula
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb , Subshrub
- Height:
- 8-12 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec
- Bloom Colors:
- Yellow
- Evergreen Shrub:
- Yes
Native Range
United States: California, Colorado, New Mexico, Oregon, Canada: Alberta, British Columbia, Manitoba, Northwest Territories, Ontario, Quebec, Saskatchewan
Keystone Species Ranking
- Bee Keystone:
- ★☆☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Reported Fauna Sightings
Bees: Black-tailed bumble bee (Bombus melanopygus), Black-tailed bumble bee (Bombus melanopygus), Yellow-faced bumble bee (Bombus vosnesenskii), Yellow-faced bumble bee (Bombus vosnesenskii)
Soil Requirements
- Soil Type:
- sandy, 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 open, rocky slopes and grasslands
Germination Information
Pre-treatment: Soak fresh seeds overnight in water. Cold stratify in peat moss for 2 weeks or until seeds begin to sprout.
Establishment: There is a variation in the germination rate depending on the conditions. Lower germination rates were observed under controlled conditions for seed cold-stored at approximately 44F in moist vermiculite. Transplant survival averages 75%.
Source: npn.rngr.net