North America Non-native Plant

Blue Lupine

Botanical name: Lupinus pilosus

USDA symbol: LUPI9

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

Blue Lupine (Lupinus pilosus): A Mystery Plant Worth Understanding If you’ve stumbled across the name blue lupine or Lupinus pilosus in your native plant research, you might be scratching your head trying to find solid information about this particular species. And honestly? You’re not alone in that confusion. What We ...

Blue Lupine (Lupinus pilosus): A Mystery Plant Worth Understanding

If you’ve stumbled across the name blue lupine or Lupinus pilosus in your native plant research, you might be scratching your head trying to find solid information about this particular species. And honestly? You’re not alone in that confusion.

What We Know (And Don’t Know) About This Blue Lupine

Lupinus pilosus, commonly called blue lupine, belongs to the legume family and is classified as a dicot. However, here’s where things get tricky – reliable, comprehensive information about this specific species is surprisingly scarce in standard botanical databases and native plant resources.

This lack of readily available information could mean several things: it might be an extremely rare species, a regional variant that hasn’t been extensively studied, or possibly even a case of taxonomic confusion where the name has been applied inconsistently over time.

Geographic Distribution: The Big Question Mark

Unfortunately, the native range and geographic distribution of Lupinus pilosus remains unclear based on current reliable sources. This makes it difficult to recommend for specific regions or to verify its true native status.

Should You Plant This Blue Lupine?

Here’s where we need to pump the brakes a bit. Without clear information about this species’ native range, growing requirements, or even its current availability in the nursery trade, it’s hard to give you solid planting advice.

If you’re interested in blue lupines for your garden, consider these well-documented alternatives instead:

  • Lupinus perennis (Wild Lupine) – native to eastern North America
  • Lupinus argenteus (Silvery Lupine) – native to western regions
  • Lupinus polyphyllus (Large-leaved Lupine) – though check invasive status in your area

The Lupine Family: What You Can Expect

While we can’t speak specifically to Lupinus pilosus, lupines as a group share some wonderful characteristics that make them garden favorites:

  • Distinctive spikes of pea-like flowers
  • Palmate leaves that create attractive foliage
  • Nitrogen-fixing abilities that improve soil
  • Potential pollinator magnets (when native to your area)

A Word of Caution for Plant Enthusiasts

This situation with Lupinus pilosus highlights an important lesson for native plant gardeners: always verify your plant identifications and sources. When species information is unclear or contradictory, it’s better to choose well-documented native alternatives that you know will thrive in your specific region.

Your Best Next Steps

If you’re set on growing blue lupines, here’s what I recommend:

  • Contact your local native plant society for regional expertise
  • Check with your county extension office about suitable lupine species
  • Visit local native plant sales where experts can help with proper identification
  • Consider other blue native flowers if lupines aren’t well-suited to your area

Remember, successful native gardening isn’t just about finding plants with pretty names – it’s about choosing species that truly belong in your local ecosystem and will thrive with minimal fuss. Sometimes the most responsible choice is admitting when we need more information before we dig in.

Blue Lupine

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

Lupinus L. - lupine

Species

Lupinus pilosus L. - blue lupine

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