North America Native Plant

Smallflower Bird’s-foot Trefoil

Botanical name: Lotus parviflorus

USDA symbol: LOPA81

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Lotus hispidus Desf. ex DC. (LOHI7)   

Smallflower Bird’s-Foot Trefoil: A Petite Pacific Northwest Native Meet the smallflower bird’s-foot trefoil (Lotus parviflorus), a charming little native wildflower that’s been quietly brightening meadows and grasslands across the Pacific Northwest for centuries. While it might not be the showiest plant in your garden, this modest annual has some delightful ...

Smallflower Bird’s-Foot Trefoil: A Petite Pacific Northwest Native

Meet the smallflower bird’s-foot trefoil (Lotus parviflorus), a charming little native wildflower that’s been quietly brightening meadows and grasslands across the Pacific Northwest for centuries. While it might not be the showiest plant in your garden, this modest annual has some delightful qualities that make it worth considering for the right gardening situation.

What Is Smallflower Bird’s-Foot Trefoil?

Smallflower bird’s-foot trefoil is an annual forb—basically a non-woody flowering plant that completes its entire life cycle in one growing season. As its name suggests, this plant produces small, delicate flowers that are characteristic of the bird’s-foot trefoil family. Don’t let the diminutive size fool you; what it lacks in stature, it makes up for in ecological value and understated charm.

This native beauty belongs to the legume family, which means it has a superpower: it can actually improve your soil by fixing nitrogen through a partnership with beneficial bacteria in its roots. Talk about a plant that gives back!

Where Does It Call Home?

Smallflower bird’s-foot trefoil is native to the lower 48 states, with confirmed populations thriving in Oregon and Washington. This makes it a true Pacific Northwest native, perfectly adapted to the region’s unique climate patterns and growing conditions.

Why Consider Growing Smallflower Bird’s-Foot Trefoil?

Here are some compelling reasons this little native might earn a spot in your garden:

  • Native status: Supporting local ecosystems by growing plants that naturally belong in your region
  • Pollinator support: Like most legumes, it likely attracts bees and other beneficial insects
  • Soil improvement: Its nitrogen-fixing ability can naturally enrich your garden soil
  • Low maintenance: As an annual, it’s likely to self-seed and maintain itself with minimal intervention
  • Authentic wildflower appeal: Perfect for creating genuine native meadow or prairie gardens

Best Garden Situations

Smallflower bird’s-foot trefoil shines in these garden settings:

  • Native plant gardens and naturalized landscapes
  • Wildflower meadows and prairie restorations
  • Areas where you want a more natural, less cultivated look
  • Soil improvement projects (thanks to that nitrogen-fixing superpower)
  • Butterfly and pollinator gardens

Growing Conditions and Care

While specific growing information for this species is limited, based on its Pacific Northwest origins and family characteristics, smallflower bird’s-foot trefoil likely prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Well-drained soils; probably not too picky about soil type
  • Water: Moderate moisture; likely drought-tolerant once established
  • Hardiness: Suitable for USDA zones 8-10, matching its Pacific Northwest range

Planting and Establishment Tips

Since this is an annual plant, growing smallflower bird’s-foot trefoil is refreshingly straightforward:

  • Direct sow seeds in fall or early spring when temperatures are cool
  • Scatter seeds over prepared soil and lightly rake in
  • Keep soil consistently moist until germination occurs
  • Once established, allow the plant to complete its cycle and drop seeds for next year
  • Avoid over-fertilizing—as a legume, it prefers leaner soils

The Reality Check

Let’s be honest: smallflower bird’s-foot trefoil isn’t going to win any most spectacular garden plant contests. Its appeal lies in its authenticity, ecological value, and the satisfaction of growing something truly native to your region. If you’re looking for bold colors or dramatic garden statements, you might want to pair it with showier native companions.

However, if you’re passionate about supporting local ecosystems, creating authentic habitat, or simply appreciate the quiet beauty of native wildflowers, this little trefoil could be exactly what your garden needs.

The Bottom Line

Smallflower bird’s-foot trefoil represents the kind of plant that serious native garden enthusiasts appreciate—not flashy, but genuine, beneficial, and perfectly at home in Pacific Northwest landscapes. It’s a wonderful choice for gardeners who value ecological authenticity over ornamental drama, and it offers the bonus of actually improving your soil while supporting local pollinators.

Consider adding it to wildflower seed mixes or letting it naturalize in areas where you want a true taste of the Pacific Northwest’s native plant heritage. Sometimes the most valuable garden residents are the ones that work quietly behind the scenes, and smallflower bird’s-foot trefoil does exactly that.

Smallflower 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 parviflorus Desf. - smallflower 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