North America Non-native Plant

Boissier’s Clover

Botanical name: Trifolium boissieri

USDA symbol: TRBO11

Native status: Not native but doesn't reproduce and persist in the wild

Boissier’s Clover: A Lesser-Known Member of the Clover Family If you’ve stumbled across the name Boissier’s clover (Trifolium boissieri) in your gardening research, you might be wondering what makes this particular clover special—and whether it deserves a spot in your garden. Well, you’re in for a bit of a mystery, ...

Boissier’s Clover: A Lesser-Known Member of the Clover Family

If you’ve stumbled across the name Boissier’s clover (Trifolium boissieri) in your gardening research, you might be wondering what makes this particular clover special—and whether it deserves a spot in your garden. Well, you’re in for a bit of a mystery, because this is one of those plants that keeps botanists and gardeners scratching their heads due to limited available information.

What We Know About Boissier’s Clover

Boissier’s clover belongs to the extensive Trifolium genus, which includes over 300 species of clovers worldwide. While many of its clover cousins are well-documented garden favorites and agricultural staples, Trifolium boissieri remains somewhat enigmatic in the horticultural world.

Like other members of the clover family, this species is likely a dicotyledonous plant that produces the characteristic three-leaflet leaves (trifoliate) that give the genus its name. As with most clovers, it probably has the ability to fix nitrogen in the soil through a symbiotic relationship with bacteria in root nodules—a pretty nifty trick that benefits surrounding plants.

Geographic Distribution and Native Status

The exact native range and distribution of Boissier’s clover remains unclear from available sources. This lack of detailed information makes it challenging to determine where this species naturally occurs and whether it might be appropriate for specific regional gardens.

Should You Grow Boissier’s Clover?

Here’s where things get interesting (and a bit frustrating for us plant enthusiasts). With limited information available about Trifolium boissieri’s growing requirements, hardiness zones, and ecological impact, it’s difficult to make a confident recommendation about including it in your garden.

The Pollinator Question

If this species follows the typical clover pattern, it likely produces small flowers that attract bees, butterflies, and other beneficial insects. Clovers are generally excellent pollinator plants, offering both nectar and pollen throughout their blooming season.

Growing Considerations

Without specific cultivation information for Trifolium boissieri, gardeners interested in this species would be venturing into largely uncharted territory. Most clovers prefer:

  • Full sun to partial shade
  • Well-draining soil
  • Moderate water requirements
  • Cool to moderate temperatures

However, these are generalizations based on the broader clover family, not specific data for Boissier’s clover.

Better-Documented Alternatives

If you’re drawn to the idea of growing clovers in your garden, consider these well-researched native alternatives that offer similar benefits with much more reliable growing information:

  • White clover (Trifolium repens) – excellent groundcover and pollinator plant
  • Red clover (Trifolium pratense) – taller option great for meadow gardens
  • Buffalo clover (Trifolium reflexum) – native to eastern North America

The Bottom Line

Boissier’s clover represents one of those intriguing botanical puzzles that remind us how much we still have to learn about the plant world. While the mystery surrounding this species might appeal to adventurous gardeners, most people will be better served by choosing well-documented native clovers that offer proven benefits for pollinators and soil health.

If you do encounter seeds or plants labeled as Trifolium boissieri, approach with curiosity but also caution. Make sure any plant material comes from reputable sources, and consider reaching out to local botanical experts or extension offices who might have more region-specific information.

Sometimes the most responsible gardening choice is to appreciate a plant’s mystery from afar while choosing better-understood species that we know will thrive and support local ecosystems. Your garden—and the creatures that depend on it—will thank you for the thoughtful approach.

Boissier’s 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 boissieri Guss. ex Soy.-Will. & Godr. - Boissier's clover

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