Drummond's Milkvetch
Astragalus drummondii
Hosts 2 caterpillarsPollinator plantNitrogen fixer
(c) Matt Lavin, some rights reserved (CC BY-SA)
Growing it
| Type | wildflower |
|---|---|
| Sun | Full sun |
| Water | Low |
| Soil | pH 6.5–8.5 |
| Hardiness | zone 3–7 |
| Mature height | 0.6 m |
| Mature spread | 0.75 m |
| Spacing | 0.5 m |
| Years to maturity | 4 |
| Bloom | May–Jul |
| Flower colour | Purple not verified |
| In bloom | May June July |
| Fruit | Jul–Sep |
| Native to | AB, SK |
feather-compound leaves about 10 cm long
Documented animals
14 documented relationships.
pollen for
- Andrena vicina Clements & F. L. Long 1923
- Black-tailed Bumble Bee Clements & F. L. Long 1923
- Central Bumble Bee Clements & F. L. Long 1923
- Golden Northern Bumble Bee Clements & F. L. Long 1923
- Hoplitis albifrons Clements & F. L. Long 1923
- Hunt's Bumble Bee Clements & F. L. Long 1923
- Megachile melanophaea Clements & F. L. Long 1923
nectar for
- Central Bumble Bee Specimen records from iNaturalist.org
- Golden Northern Bumble Bee Specimen records from iNaturalist.org
- Hunt's Bumble Bee Specimen records from iNaturalist.org
- Megachile frigida LaManna et al. 2020
- Nevada Bumble Bee Specimen records from iNaturalist.org
caterpillar host for
- Silvery Blue Acorn & Sheldon 2006
- Western Tailed-Blue Acorn & Sheldon 2006
Where it has been recorded
- Fescue Grassland south AB: 447 occurrence records, high confidence
- Mixed Grassland south AB / SK: 223 occurrence records, high confidence
- Moist Mixed Grassland south AB / SK: 189 occurrence records, high confidence
- Aspen Parkland central AB / SK: 33 occurrence records, high confidence
- Cypress Upland south AB / SK: 16 occurrence records, medium confidence
- Northern Continental Divide south AB: 13 occurrence records, medium confidence
A range seen three times is not the same claim as one seen three hundred, so the count travels with the region. Boundaries digitised from the National Ecological Framework for Canada v2.2 (Ecological Stratification Working Group 1995), simplified to about 900 m for display: an outline is accurate to roughly a kilometre, not to the metre.
Also worth knowing
Safety
Low toxicity to pets
Buying it
price: about $8–$16 per plant (estimate); availability: native specialist; notes: Estimate (herb default); AB retail as of 2026
Where these numbers came from
- Flower detail: not verified, a genus-level estimate