North America Native Plant

Bull Clover

Botanical name: Trifolium fucatum

USDA symbol: TRFU

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Trifolium flavulum Greene (TRFL8)  âš˜  Trifolium fucatum Lindl. var. gambelii (Nutt.) Jeps. (TRFUG)  âš˜  Trifolium fucatum Lindl. var. virescens (Greene) Jeps. (TRFUV)  âš˜  Trifolium gambelii Nutt. (TRGA2)   

Bull Clover: A Native Ground Cover Worth Considering Looking for a low-maintenance native plant that can handle tough conditions? Meet bull clover (Trifolium fucatum), a hardy annual that’s been quietly doing its job across the American West for centuries. While it might not be the showiest plant in your garden, ...

Bull Clover: A Native Ground Cover Worth Considering

Looking for a low-maintenance native plant that can handle tough conditions? Meet bull clover (Trifolium fucatum), a hardy annual that’s been quietly doing its job across the American West for centuries. While it might not be the showiest plant in your garden, this unassuming little clover has some serious staying power and ecological benefits that make it worth a second look.

What is Bull Clover?

Bull clover is a native annual forb – basically, that means it’s a soft-stemmed plant (not woody like a shrub) that completes its life cycle in one year. Don’t let its humble appearance fool you; this little powerhouse belongs to the legume family, which means it’s actually improving your soil while it grows by fixing nitrogen from the air.

You might also see this plant listed under several scientific synonyms in older references, including Trifolium gambelii and Trifolium flavulum, but Trifolium fucatum is the accepted name today.

Where Does Bull Clover Call Home?

This resilient native can be found across California, Michigan, Oregon, and Washington, showing just how adaptable it is to different climates and conditions. Its ability to thrive from the Pacific Coast to the Great Lakes region speaks to its versatility as a garden plant.

Why Plant Bull Clover in Your Garden?

Here’s where bull clover really shines:

  • It’s truly native – Supporting local ecosystems never goes out of style
  • Low maintenance – As an annual, it does its thing and doesn’t demand much attention
  • Soil improvement – Those nitrogen-fixing abilities mean it’s actually making your garden better
  • Pollinator friendly – Small flowers provide nectar for bees and other beneficial insects
  • Versatile growing conditions – Comfortable in both slightly wet and dry areas

Growing Conditions and Care

Bull clover is refreshingly unfussy about its living situation. Based on its wetland status, it’s quite adaptable – in western regions, it usually prefers drier ground but can handle some moisture, while in other areas it’s almost exclusively found in non-wetland conditions.

This adaptability makes it perfect for:

  • Native plant restoration projects
  • Naturalized garden areas
  • Ground cover in low-maintenance landscapes
  • Erosion control on slopes

Planting and Care Tips

Since bull clover is an annual, you’ll want to let it self-seed for continuous coverage, or plan to replant each year. Here are some general guidelines:

  • Timing – Plant seeds in fall or early spring
  • Location – Full sun to partial shade works well
  • Soil – Well-draining soil is preferred, but it’s quite adaptable
  • Water – Drought tolerant once established
  • Maintenance – Minimal care needed; let it do its thing naturally

The Bottom Line

Bull clover might not win any beauty contests, but it’s the kind of reliable, hardworking plant that every native garden needs. If you’re looking to support local wildlife, improve your soil naturally, and add some authentic regional character to your landscape, this humble clover deserves a spot in your garden plans.

Just remember – like many native plants, bull clover works best when you let it follow its natural patterns rather than trying to make it behave like a traditional garden plant. Give it some space to self-seed, and you’ll have a sustainable ground cover that takes care of itself year after year.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Midwest

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Northcentral & Northeast

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Western Mountains, Valleys, and Coast

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Bull Clover

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

Trifolium L. - clover

Species

Trifolium fucatum Lindl. - bull clover

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