North America Native Plant

Softhair Marbleseed

Botanical name: Onosmodium bejariense var. hispidissimum

USDA symbol: ONBEH

Life cycle: perennial

Habit: forb

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

Synonyms: Lithospermum carolinianum auct. non Lam. (LICA29)  âš˜  Onosmodium hispidissimum Mack. (ONHI)  âš˜  Onosmodium hispidissimum Mack. var. macrospermum Mack. & Bush (ONHIM)  âš˜  Onosmodium molle Michx. var. hispidissimum (Mack.) Cronquist (ONMOH)  âš˜  Onosmodium molle Michx. ssp. hispidissimum (Mack.) B. Boivin (ONMOH2)   

Softhair Marbleseed: A Hardy Native Wildflower for Low-Maintenance Gardens If you’re looking for a tough, no-fuss native wildflower that won’t demand constant attention, softhair marbleseed (Onosmodium bejariense var. hispidissimum) might just be your new gardening friend. This perennial forb may not win any beauty contests, but it brings authentic native ...

Softhair Marbleseed: A Hardy Native Wildflower for Low-Maintenance Gardens

If you’re looking for a tough, no-fuss native wildflower that won’t demand constant attention, softhair marbleseed (Onosmodium bejariense var. hispidissimum) might just be your new gardening friend. This perennial forb may not win any beauty contests, but it brings authentic native charm and ecological value to gardens across much of eastern and central North America.

What is Softhair Marbleseed?

Softhair marbleseed is a native perennial forb—essentially a non-woody flowering plant that comes back year after year. True to its name, this plant sports distinctively hairy (hispid) stems and leaves that give it a somewhat coarse, textured appearance. Don’t let the soft in its common name fool you; those hairs can actually feel quite rough to the touch!

As a member of the borage family, softhair marbleseed produces small, tubular white flowers arranged in clusters. While the individual blooms are modest, they collectively create an interesting display that native pollinators absolutely appreciate.

Where Does It Grow Naturally?

This hardy native has quite an impressive range, naturally occurring across a wide swath of North America. You’ll find softhair marbleseed growing wild from southern Canada down through much of the eastern and central United States, including Alabama, Arkansas, Connecticut, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Wisconsin, plus Ontario and Quebec in Canada.

Why Grow Softhair Marbleseed?

Here are some compelling reasons to consider adding this native plant to your garden:

  • Native authenticity: Supporting local ecosystems with truly native plants
  • Low maintenance: Once established, it’s quite drought tolerant and self-sufficient
  • Pollinator support: Native bees and other small pollinators visit the flowers
  • Prairie garden perfect: Ideal for wildflower meadows and native plant gardens
  • Hardy performer: Thrives in USDA zones 3-8, handling both cold winters and hot summers

Growing Conditions and Care

Softhair marbleseed is refreshingly undemanding when it comes to growing conditions:

  • Sunlight: Full sun to partial shade (though it performs best with plenty of sunshine)
  • Soil: Well-drained soils of various types; not picky about soil quality
  • Water: Drought tolerant once established; avoid overwatering
  • Maintenance: Minimal care required after establishment

Planting and Establishment Tips

Getting softhair marbleseed started in your garden is straightforward:

  • Direct seed in fall for natural cold stratification
  • Seeds may take time to germinate, so be patient
  • Young plants may self-seed once established
  • Space appropriately for a naturalized look rather than formal planting
  • Water during the first growing season to help establishment

Garden Design Ideas

Softhair marbleseed works best in informal, naturalistic settings rather than formal flower beds. Consider using it in:

  • Native wildflower meadows
  • Prairie restoration projects
  • Naturalized areas of larger properties
  • Native plant gardens focused on ecological value
  • Areas where you want low-maintenance native coverage

The Bottom Line

Softhair marbleseed won’t be the showstopper of your garden, but it’s the kind of reliable, authentic native plant that forms the backbone of truly sustainable landscapes. If you’re drawn to native plants that support local ecosystems while requiring minimal fuss, this hardy perennial forb deserves a spot in your garden. Just remember—sometimes the most valuable plants are the ones that quietly do their job while supporting the bigger picture of biodiversity and ecological health.

Softhair Marbleseed

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Onosmodium Michx. - marbleseed

Species

Onosmodium bejariense DC. ex A. DC. - soft-hair marbleseed

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