North America Native Plant

Silver Bird’s-foot Trefoil

Botanical name: Lotus argophyllus var. argenteus

USDA symbol: LOARA2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Hosackia ornithopa Greene (HOOR4)  âš˜  Hosackia ornithopa Greene ssp. venusta (Eastw.) Abrams (HOORV)  âš˜  Lotus argophyllus (A. Gray) Greene ssp. ornithopus (Greene) P.H. Raven (LOARO)  âš˜  Lotus argophyllus (A. Gray) Greene var. ornithopus (Greene) Ottley (LOARO2)   

Silver Bird’s-Foot Trefoil: A Charming California Native for Low-Maintenance Gardens If you’re looking for a plant that combines natural beauty with practically zero fuss, let me introduce you to silver bird’s-foot trefoil (Lotus argophyllus var. argenteus). This delightful California native might have a mouthful of a name, but it’s actually ...

Silver Bird’s-Foot Trefoil: A Charming California Native for Low-Maintenance Gardens

If you’re looking for a plant that combines natural beauty with practically zero fuss, let me introduce you to silver bird’s-foot trefoil (Lotus argophyllus var. argenteus). This delightful California native might have a mouthful of a name, but it’s actually one of the most easygoing perennial herbs you can add to your garden.

What Makes Silver Bird’s-Foot Trefoil Special?

Silver bird’s-foot trefoil is a native perennial herb that belongs to the pea family, and it shows! You’ll recognize its characteristic small, bright yellow flowers that look like tiny sweet peas dancing in the breeze. But what really sets this plant apart is its stunning silvery-green foliage that seems to shimmer in the sunlight—hence the silver in its common name.

As a forb herb, this plant stays relatively low to the ground and never develops woody stems, making it perfect for creating natural-looking ground cover that won’t overwhelm your garden design.

Where Does It Call Home?

This beautiful native is exclusively found in California, where it has adapted perfectly to the state’s unique coastal and inland conditions. From sandy beaches to rocky hillsides, silver bird’s-foot trefoil has learned to thrive in some pretty challenging environments.

Why Your Garden (and Local Wildlife) Will Love It

There are several compelling reasons to consider adding silver bird’s-foot trefoil to your landscape:

  • Pollinator magnet: Those cheerful yellow flowers are like tiny beacons for bees and butterflies, providing them with much-needed nectar
  • Drought tolerance: Once established, this plant can handle California’s dry summers with minimal supplemental watering
  • Erosion control: The root system helps stabilize soil, making it excellent for slopes or areas prone to erosion
  • Low maintenance: After the initial establishment period, it practically takes care of itself
  • Native authenticity: You’re supporting local ecosystems by choosing a plant that naturally belongs in your area

Perfect Garden Scenarios

Silver bird’s-foot trefoil shines in several garden settings:

  • Native plant gardens: Pairs beautifully with other California natives
  • Coastal gardens: Handles salt spray and sandy conditions like a champ
  • Xeriscape designs: Perfect for water-wise landscaping
  • Naturalistic plantings: Creates that effortless, wild look that’s so popular now
  • Pollinator gardens: An essential component for supporting local bee and butterfly populations

Growing Conditions That Make It Happy

The beauty of silver bird’s-foot trefoil lies in its adaptability, but it does have some preferences:

  • Sunlight: Full sun to partial shade (though it flowers best with plenty of sunshine)
  • Soil: Well-draining soil is crucial—it doesn’t tolerate soggy conditions
  • Water: Moderate water during establishment, then drought tolerant
  • Climate: Thrives in USDA zones 9-11, perfect for California’s Mediterranean climate

Planting and Care Tips for Success

Getting started with silver bird’s-foot trefoil is refreshingly straightforward:

  • When to plant: Fall is ideal, giving roots time to establish before summer heat
  • Spacing: Allow adequate room for spreading—this plant likes to naturalize
  • Initial care: Water regularly for the first few months, then gradually reduce frequency
  • Maintenance: Minimal pruning needed; just remove any dead growth in late winter
  • Fertilizing: Generally unnecessary—too much nutrition can actually reduce flowering

A Few Things to Keep in Mind

While silver bird’s-foot trefoil is generally problem-free, here are a few considerations:

  • It may go dormant or look less attractive during extremely hot, dry periods—this is normal
  • Like many natives, it’s adapted to lean soils and may not appreciate rich, amended garden soil
  • Be patient during establishment; native plants often take a season or two to really hit their stride

The Bottom Line

Silver bird’s-foot trefoil is one of those rare plants that manages to be both beautiful and practically bulletproof. If you’re in California and looking for a native plant that supports local wildlife, requires minimal care, and adds subtle elegance to your garden, this charming perennial deserves a spot on your plant list. Your local pollinators will thank you, your water bill will thank you, and you’ll have the satisfaction of growing something that truly belongs in your landscape.

Silver Bird’s-foot Trefoil

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

Lotus L. - trefoil

Species

Lotus argophyllus (A. Gray) Greene - silver bird's-foot trefoil

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