North America Non-native Plant

Medicago Sativa Caerulea

Botanical name: Medicago sativa caerulea

USDA symbol: MESAC2

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

Medicago sativa caerulea: A Garden Mystery Worth Investigating If you’ve stumbled across the name Medicago sativa caerulea in your gardening research, you’re not alone in wondering what exactly this plant is. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, as reliable information about this specific ...

Medicago sativa caerulea: A Garden Mystery Worth Investigating

If you’ve stumbled across the name Medicago sativa caerulea in your gardening research, you’re not alone in wondering what exactly this plant is. This botanical name presents quite the puzzle for gardeners and plant enthusiasts alike, as reliable information about this specific designation is remarkably scarce.

The Name Game: What We Know (And Don’t Know)

Medicago sativa caerulea appears to be either a very rare historical variety, an obsolete botanical name, or possibly a misidentification. The genus Medicago includes well-known plants like alfalfa (Medicago sativa), but the specific variety or subspecies caerulea doesn’t appear in current botanical databases or contemporary horticultural references.

Without a confirmed common name or clear botanical standing, this plant remains something of an enigma. The term caerulea typically refers to blue coloration in botanical nomenclature, suggesting this might have been a blue-flowered form of a Medicago species.

Geographic Distribution and Native Status

Unfortunately, the geographic distribution and native status of Medicago sativa caerulea cannot be definitively established due to the uncertain botanical validity of this name. This lack of clear documentation makes it impossible to determine where this plant naturally occurs or whether it’s native to any particular region.

A Gardener’s Dilemma: Should You Plant It?

Here’s where things get tricky for gardeners. Without reliable information about this plant’s characteristics, growing requirements, or even its current botanical validity, it’s difficult to recommend for or against planting it. If you encounter seeds or plants labeled with this name, proceed with caution and consider these alternatives:

  • Research the source thoroughly to understand what plant you’re actually getting
  • Consider well-documented native alternatives from the Medicago genus if available in your region
  • Consult with local botanical experts or extension services for clarification

Growing Conditions: Educated Guesses

If this plant is indeed related to other Medicago species, it would likely prefer:

  • Full sun exposure
  • Well-draining soil
  • Moderate water requirements
  • Neutral to slightly alkaline soil pH

However, these are assumptions based on the genus characteristics rather than specific knowledge of this variety.

The Bottom Line for Gardeners

While the mystery surrounding Medicago sativa caerulea might intrigue plant collectors and botanical detectives, practical gardeners are probably better served choosing well-documented native plants with known characteristics and benefits. If you’re interested in the Medicago genus, consider researching confirmed native species in your area that can provide similar aesthetic or ecological benefits.

The gardening world is full of fascinating plant mysteries, but when it comes to actually filling your garden beds, reliability and clear information usually trump botanical puzzles. Save the detective work for your spare time, and choose proven performers for your landscape!

Medicago Sativa Caerulea

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

Medicago L. - alfalfa

Species

Medicago sativa L. - alfalfa

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