North America Native Plant

Stiff Ticktrefoil

Botanical name: Desmodium obtusum

USDA symbol: DEOB5

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Desmodium rigidum (Elliott) DC. (DERI3)  âš˜  Meibomia obtusa (Muhl. ex Willd.) Vail (MEOB6)  âš˜  Meibomia rigida (Elliott) Kuntze (MERI)   

Stiff Ticktrefoil: A Native Powerhouse for Wildlife Gardens If you’re looking to create a garden that truly supports local wildlife while adding late-season color, let me introduce you to stiff ticktrefoil (Desmodium obtusum). This native perennial might not have the flashiest name, but don’t let that fool you – it’s ...

Stiff Ticktrefoil: A Native Powerhouse for Wildlife Gardens

If you’re looking to create a garden that truly supports local wildlife while adding late-season color, let me introduce you to stiff ticktrefoil (Desmodium obtusum). This native perennial might not have the flashiest name, but don’t let that fool you – it’s a hardworking plant that punches well above its weight when it comes to feeding and sheltering wildlife.

What Is Stiff Ticktrefoil?

Stiff ticktrefoil is a native perennial forb that belongs to the legume family. As a forb, it’s an herbaceous plant without woody stems, making it perfect for adding texture and movement to naturalistic plantings. This sturdy native has been quietly supporting North American ecosystems for centuries, and it’s ready to do the same in your garden.

Where Does It Grow Naturally?

This adaptable native calls much of the United States home, naturally occurring across 31 states from the Atlantic coast to the Great Plains. You’ll find it thriving from Alabama and Florida in the south, up through New England, and west to Colorado, Kansas, and Texas. Its wide native range speaks to its adaptability and resilience – qualities that make it an excellent garden plant.

Why Your Garden (and Local Wildlife) Will Love It

Here’s where stiff ticktrefoil really shines: it’s like a bustling diner for local wildlife. Research shows that this unassuming plant provides 10-25% of the diet for large animals and terrestrial birds, while also offering occasional cover. That’s no small contribution to the local ecosystem!

Beyond its wildlife value, stiff ticktrefoil brings several benefits to your garden:

  • Late-summer blooms when many other natives are winding down
  • Attractive trifoliate leaves that add interesting texture
  • Purple-pink flowers that attract bees, butterflies, and other pollinators
  • Drought tolerance once established
  • Low maintenance requirements
  • Natural nitrogen fixation (thanks to its legume family roots)

Garden Design and Landscape Role

Stiff ticktrefoil is perfect for naturalistic garden designs where you want to recreate the look and function of native plant communities. It works beautifully in:

  • Prairie and meadow restorations
  • Native plant gardens
  • Wildlife habitat gardens
  • Woodland edge plantings
  • Pollinator gardens
  • Low-maintenance landscape areas

Growing 2-4 feet tall with a spread of 1-2 feet, it’s sized just right for middle-of-the-border plantings or as part of a mixed native groundcover.

Growing Conditions and Care

One of the best things about native plants like stiff ticktrefoil is that they’re adapted to local conditions, making them naturally easier to grow than many non-native alternatives.

Sunlight: Full sun to partial shade – quite adaptable to different light conditions

Soil: Tolerates various soil types, though it performs best in well-draining soils

Water: Drought tolerant once established, though regular water during the first growing season helps establishment

USDA Hardiness Zones: 4-9, making it suitable for most of the continental United States

Planting and Care Tips

Growing stiff ticktrefoil successfully is refreshingly straightforward:

  • Plant in spring after the last frost or in early fall
  • Space plants 1-2 feet apart to allow for natural spreading
  • Water regularly during the first year to encourage deep root development
  • Once established, minimal care is needed
  • Allow plants to go to seed if you want natural reseeding
  • Cut back in late fall or early spring before new growth begins

As a legume, stiff ticktrefoil actually improves soil fertility by fixing nitrogen, so you won’t need to worry about fertilizing.

The Bottom Line

Stiff ticktrefoil might not be the showiest plant in your garden, but it’s definitely one of the hardest working. If you’re committed to supporting local wildlife, reducing garden maintenance, and growing plants that truly belong in your landscape, this native deserves a spot in your garden. Plus, there’s something deeply satisfying about knowing that the unassuming plant in your border is quietly feeding birds and other creatures throughout the growing season.

In a world of high-maintenance garden divas, stiff ticktrefoil is the reliable friend who shows up, does the work, and makes everyone else look good. Your local ecosystem will thank you for it.

Wildlife Status

Want to attract wildlife or keep hungry critters away from your garden? Understanding the relationship between plants and wildlife is key. While plant tags may indicate deer and rabbit resistance, they don't tell the full story. Every gardener has experienced the disappointment of purchasing "deer-resistant" plants only to find them nibbled to the ground!

The extent to which plants are resistant to animal browsing is a matter of degree. Likewise, the extent to which a plant attracts wanted visitors also varies. Whether you want a garden full or free of wildlife, learning about interactions between a plant and wild animals can help you make smarter choices for the garden you desire.

As shown below Shrubby Indian Mallow isn't a large food source for animals or birds. You can confidently add this plant to your garden and rest assured knowing it's unlikely to be devoured by four-legged visitors.

Small animals

not a food source

not a source of cover

Large animals

Average 10-25% of diet

Occasional source of cover

Terrestrial birds

Average 10-25% of diet

Occasional source of cover

Water birds

not a food source

not a source of cover

Sources:

Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses. Southern Weed Science Society.

Stiff Ticktrefoil

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

Desmodium Desv. - ticktrefoil

Species

Desmodium obtusum (Muhl. ex Willd.) DC. - stiff ticktrefoil

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