North America Native Plant

Field Locoweed

Botanical name: Oxytropis campestris

USDA symbol: OXCA4

Life cycle: perennial

Habit: forb

Native status: Native to Alaska âš˜ Native to Canada âš˜ Native to the lower 48 states  

Field Locoweed: A Hardy Native Wildflower for Challenging Gardens If you’re looking for a tough-as-nails native wildflower that can handle whatever Mother Nature throws at it, meet field locoweed (Oxytropis campestris). This unassuming perennial forb might not win any beauty contests, but it’s got character in spades and plays an ...

Field Locoweed: A Hardy Native Wildflower for Challenging Gardens

If you’re looking for a tough-as-nails native wildflower that can handle whatever Mother Nature throws at it, meet field locoweed (Oxytropis campestris). This unassuming perennial forb might not win any beauty contests, but it’s got character in spades and plays an important role in North America’s natural landscapes.

What Is Field Locoweed?

Field locoweed is a hardy perennial forb – basically a non-woody herbaceous plant that comes back year after year. As a member of the legume family, it shares DNA with more familiar plants like beans and peas, though you definitely wouldn’t want to toss this one in your salad bowl (more on that later!).

This plant is a true North American native, naturally occurring across an impressive range that spans from Alaska and northern Canada all the way down through many of the northern and western United States. You’ll find it growing wild in Alberta, British Columbia, Alaska, Manitoba, New Brunswick, Nova Scotia, Ontario, Colorado, Quebec, Saskatchewan, Yukon, Northwest Territories, Nunavut, Idaho, Maine, Minnesota, Montana, North Dakota, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming, Labrador, and Newfoundland.

Why Consider Field Locoweed for Your Garden?

While field locoweed might not be the showstopper of your garden, it brings several valuable qualities to the table:

  • Extreme hardiness: This plant thrives in USDA hardiness zones 2-7, handling harsh winters that would make other plants throw in the trowel
  • Pollinator support: The small purple to pink pea-like flowers attract native bees, butterflies, and other beneficial insects
  • Low maintenance: Once established, it’s practically bomb-proof and requires minimal care
  • Erosion control: Its spreading growth habit makes it useful for stabilizing slopes and challenging sites
  • Drought tolerance: Perfect for water-wise gardening and areas with limited rainfall

Garden Design and Landscape Uses

Field locoweed isn’t your typical cottage garden darling, but it shines in specialized landscape situations. It’s particularly well-suited for:

  • Rock gardens and alpine plantings
  • Xeriscapes and drought-tolerant landscapes
  • Naturalized prairie or meadow gardens
  • Erosion control on challenging slopes
  • Wildlife habitat gardens focused on native species

The plant forms compact clumps with silvery-green compound leaves and produces clusters of small flowers that add subtle color without overwhelming more dramatic plantings.

Growing Conditions and Care

One of field locoweed’s best features is its ability to thrive in conditions that challenge other plants. Here’s what it prefers:

  • Sun exposure: Full sun is ideal
  • Soil: Well-drained soils, even poor or rocky conditions
  • Water: Drought tolerant once established; avoid overwatering
  • pH: Adaptable to various soil pH levels

Planting and Care Tips

Getting field locoweed established is refreshingly straightforward:

  • Direct seed in fall for natural stratification over winter
  • Choose a sunny spot with excellent drainage
  • Water sparingly – this plant prefers to be on the dry side
  • Avoid fertilizing, as rich soils can actually weaken the plant
  • Once established, it essentially takes care of itself

Important Considerations

Before you rush out to plant field locoweed, there are a few important things to keep in mind. Despite its value to wildlife and ecosystems, some Oxytropis species can be toxic to livestock if consumed in large quantities (hence the locoweed name). While this typically isn’t an issue in home gardens, it’s worth being aware of if you have grazing animals or small children who might be tempted to sample garden plants.

The Bottom Line

Field locoweed isn’t going to be everyone’s cup of tea, and that’s perfectly okay. It’s a specialized plant for specialized situations – think of it as the reliable utility player of the native plant world. If you’re creating a naturalized landscape, need something bulletproof for harsh conditions, or want to support native pollinators with authentic regional flora, field locoweed deserves consideration.

Just remember: this is a plant that thrives on benign neglect. Sometimes the best thing you can do for field locoweed is simply leave it alone to do what it does best – survive and quietly contribute to the ecosystem, one small purple flower at a time.

Field Locoweed

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

Oxytropis DC. - locoweed

Species

Oxytropis campestris (L.) DC. - field locoweed

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