North America Native Plant

Woollypod Milkvetch

Botanical name: Astragalus purshii var. lagopinus

USDA symbol: ASPUL

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Astragalus lagopinus (Rydb.) M. Peck (ASLA14)   

Woollypod Milkvetch: A Charming Native for Western Gardens If you’re looking for a tough, drought-tolerant native that brings both beauty and ecological benefits to your garden, meet the woollypod milkvetch. This unassuming perennial might not be the showiest plant in your garden, but it’s definitely one of the most reliable ...

Rare plant alert!

Region: Conservation status by state

Status: S5T2T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Woollypod Milkvetch: A Charming Native for Western Gardens

If you’re looking for a tough, drought-tolerant native that brings both beauty and ecological benefits to your garden, meet the woollypod milkvetch. This unassuming perennial might not be the showiest plant in your garden, but it’s definitely one of the most reliable and beneficial for local wildlife.

What Makes Woollypod Milkvetch Special?

Woollypod milkvetch (Astragalus purshii var. lagopinus) is a true native gem of the American West. This hardy perennial belongs to the legume family, which means it has a special superpower: it can actually improve your soil by fixing nitrogen from the air. Talk about a plant that gives back!

The plant gets its common name from its distinctive seed pods, which are covered in soft, woolly hairs that give them a fuzzy appearance. But don’t let the simple description fool you – these little pods are quite charming in their own right.

Where Does It Call Home?

This native beauty naturally grows across California, Nevada, and Oregon, thriving in the diverse landscapes of the western United States. From mountain slopes to valley floors, woollypod milkvetch has adapted to a variety of conditions throughout its range.

Garden Appeal and Design Ideas

While woollypod milkvetch might not win any beauty contests, it has a subtle charm that grows on you. The plant produces small, purple to pink pea-like flowers that cluster together in attractive displays. Its silvery-green foliage has a lovely woolly texture that adds interesting contrast to other plants in your garden.

This low-growing perennial works wonderfully in:

  • Rock gardens and xerophytic landscapes
  • Native plant gardens and restoration projects
  • Ground cover applications in difficult areas
  • Wildflower meadows and naturalized spaces

Benefits for Pollinators and Wildlife

Here’s where woollypod milkvetch really shines! Those modest little flowers are absolute magnets for native bees and other beneficial insects. As a legume, it provides both nectar and pollen, making it a valuable food source throughout its blooming season.

The seeds also provide food for various wildlife species, and the dense growth habit can offer shelter for small creatures in your garden ecosystem.

Growing Conditions and Care

One of the best things about woollypod milkvetch is how easy it is to please once you understand its preferences. This plant thrives in USDA hardiness zones 4-8 and prefers:

  • Full sun exposure
  • Well-draining soils (it absolutely hates soggy feet!)
  • Minimal water once established
  • Poor to moderately fertile soils (avoid rich, heavily amended areas)

Remember, this is a plant that evolved in harsh conditions, so resist the urge to pamper it with too much water or fertilizer. It actually performs better when you treat it a bit tough!

Planting and Establishment Tips

Starting woollypod milkvetch from seed can be a bit tricky, as the seeds have a hard coat that needs to be broken down before germination. Here are some tips for success:

  • Scarify seeds by lightly sanding or nicking the seed coat
  • Soak seeds overnight before planting
  • Plant in fall for natural stratification over winter
  • Be patient – germination can be sporadic and slow
  • Once established, avoid disturbing the roots as they don’t like transplanting

Is Woollypod Milkvetch Right for Your Garden?

This native perennial is perfect for gardeners who:

  • Want to support local ecosystems and pollinators
  • Need plants for challenging, dry locations
  • Appreciate subtle beauty over flashy displays
  • Prefer low-maintenance, drought-tolerant options
  • Are interested in native plant gardening

However, it might not be the best choice if you’re looking for a dramatic focal point or need plants for consistently moist areas.

Final Thoughts

Woollypod milkvetch may not be the most glamorous plant in the native gardening world, but it’s definitely one of the most dependable. Its combination of drought tolerance, pollinator benefits, and soil-improving abilities makes it a valuable addition to any western garden focused on native plants and sustainable practices.

Give this humble native a try – you might just find yourself charmed by its quiet resilience and ecological generosity!

Woollypod Milkvetch

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Astragalus L. - milkvetch

Species

Astragalus purshii Douglas ex Hook. - woollypod milkvetch

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA