North America Non-native Plant

Hybrid Alfalfa

Botanical name: Medicago hybrida

USDA symbol: MEHY4

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Hybrid Alfalfa: A Mysterious Member of the Legume Family If you’ve stumbled across the name hybrid alfalfa (Medicago hybrida) in your plant research, you might be scratching your head wondering what exactly this plant is all about. Well, you’re not alone! This perennial forb is something of an enigma in ...

Hybrid Alfalfa: A Mysterious Member of the Legume Family

If you’ve stumbled across the name hybrid alfalfa (Medicago hybrida) in your plant research, you might be scratching your head wondering what exactly this plant is all about. Well, you’re not alone! This perennial forb is something of an enigma in the plant world, with surprisingly little documentation available about its characteristics and growing habits.

What We Know About Hybrid Alfalfa

Hybrid alfalfa is classified as a perennial forb, meaning it’s a non-woody plant that comes back year after year. Like other members of the Medicago genus, it belongs to the legume family, which means it has the special ability to fix nitrogen in the soil through a partnership with beneficial bacteria in its roots.

This species is considered non-native to the United States, having been introduced from elsewhere. It has established itself and reproduces naturally in the wild without human assistance, currently documented as growing in Indiana.

The Challenge with This Plant

Here’s where things get interesting (and a bit frustrating for plant enthusiasts): there’s remarkably little reliable information available about Medicago hybrida’s specific growing requirements, appearance, or garden performance. This lack of documentation makes it a risky choice for home gardeners who want predictable results.

Why You Might Want to Consider Alternatives

When planning your garden, it’s generally wise to choose plants with well-documented growing habits and known benefits. Since hybrid alfalfa falls short in this department, you might want to consider these alternatives instead:

  • Native clovers: White wild indigo (Amorpha alba) or other native legumes that provide similar nitrogen-fixing benefits
  • Native wildflowers: Purple prairie clover (Dalea purpurea) or wild bergamot (Monarda fistulosa) for pollinator support
  • Well-documented alfalfa varieties: If you specifically want alfalfa, stick with common alfalfa (Medicago sativa) which has extensive growing information available

The Bottom Line

While hybrid alfalfa isn’t necessarily a bad plant, the lack of comprehensive information about its growth habits, potential invasiveness, and garden performance makes it a questionable choice for most gardeners. When you’re investing time, money, and energy into your landscape, it makes sense to choose plants with proven track records and clear growing guidelines.

If you’re specifically interested in legumes for nitrogen fixation or pollinator support, consider exploring native alternatives that are better documented and more likely to thrive in your local ecosystem. Your garden (and local wildlife) will thank you for choosing plants that are well-suited to your area and have predictable growing habits.

A Word of Caution

Since the invasive status of this species is unknown, and given that it’s already established and spreading naturally in at least one state, it would be wise to avoid planting it until more is known about its ecological impact. When in doubt, native plants are always your safest and most beneficial choice for supporting local ecosystems.

Hybrid Alfalfa

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 hybrida (Pourr.) Trautv. - hybrid alfalfa

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