North America Non-native Plant

Snail Medick

Botanical name: Medicago scutellata

USDA symbol: MESC6

Life cycle: annual

Habit: forb

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

Snail Medick: A Quirky Ground-Covering Annual Meet snail medick (Medicago scutellata), a humble little annual that’s been quietly making itself at home in American gardens and wild spaces. With its distinctive coiled seed pods that give it its whimsical name, this Mediterranean native brings both charm and practicality to the ...

Snail Medick: A Quirky Ground-Covering Annual

Meet snail medick (Medicago scutellata), a humble little annual that’s been quietly making itself at home in American gardens and wild spaces. With its distinctive coiled seed pods that give it its whimsical name, this Mediterranean native brings both charm and practicality to the table—though it might not be the showstopper you’re looking for if you want eye-catching blooms.

What Exactly Is Snail Medick?

Snail medick is an annual forb, which is just a fancy way of saying it’s a non-woody herbaceous plant that completes its life cycle in one year. This low-growing plant spreads in a prostrate pattern, creating a fine-textured carpet of dark green foliage that reaches about 2 feet in height when fully mature. Don’t expect it to steal the show with flashy flowers—its small yellow blooms are fairly inconspicuous, though they do their job of attracting small pollinators.

Where You’ll Find It Growing

Originally from the Mediterranean region, snail medick has naturalized in parts of the United States, particularly in Maryland according to current distribution data. As a non-native species that reproduces spontaneously in the wild, it’s one of those plants that has decided America is a pretty nice place to call home.

The Good, The Bad, and The Practical

Here’s where snail medick gets interesting from a gardener’s perspective. This little plant is a nitrogen-fixer, meaning it actually improves soil fertility by capturing nitrogen from the air and making it available to other plants. That’s a pretty neat trick that can benefit your entire garden ecosystem.

However, let’s be honest about its limitations:

  • The flowers aren’t particularly showy or conspicuous
  • It has a slow regrowth rate after disturbance
  • It’s not going to win any beauty contests in the traditional sense
  • Commercial availability is limited—you might have trouble finding seeds

Growing Conditions That Make It Happy

If you’re thinking about giving snail medick a try, it’s refreshingly undemanding. This adaptable plant thrives in USDA hardiness zones 7-9 and prefers:

  • Well-drained soils (it adapts well to both fine and medium-textured soils)
  • Full sun conditions—it’s quite intolerant of shade
  • Moderate fertility and moisture levels
  • Soil pH between 5.9 and 7.5
  • At least 110 frost-free days

One quirk to note: snail medick requires cold stratification for germination, so those seeds need a chilly period before they’ll sprout in spring.

Planting and Care Tips

Growing snail medick is pretty straightforward if you can get your hands on seeds. Here’s what you need to know:

  • Start from seed—it’s the only practical propagation method
  • Plant in fall for natural cold stratification over winter
  • Expect moderate germination and seedling vigor
  • Once established, it self-seeds readily with moderate spread rate
  • The active growing period spans fall, winter, and spring
  • Blooms typically appear in winter, with seeds developing from spring through summer

Should You Plant It?

Snail medick occupies an interesting niche in the gardening world. It’s not invasive (as far as current data shows), but it’s also not native to North America. If you’re looking for a nitrogen-fixing ground cover for a utility area or naturalized garden space, and you appreciate plants with subtle charm rather than flashy beauty, it might be worth considering.

However, if you’re passionate about supporting native ecosystems, you might want to explore native alternatives like wild lupines, vetches, or other nitrogen-fixing legumes that are indigenous to your region. These native options will provide similar soil benefits while supporting local wildlife and pollinators more effectively.

The bottom line? Snail medick is a perfectly serviceable little plant that does its job quietly and efficiently. Just don’t expect it to be the star of your garden—think of it more as a reliable supporting character that helps make everyone else look better.

How

Snail Medick

Grows

Growing season

Fall, Winter and Spring

Lifespan
Growth form & shape

Single Crown and Prostrate

Growth rate

Moderate

Height at 20 years
Maximum height

2.0

Foliage color

Dark Green

Summer foliage density

Porous

Winter foliage density

Dense

Foliage retention

No

Flowering

No

Flower color

Yellow

Fruit/seeds

Yes

Fruit/seed color

Brown

Allelopath

No

Nitrogen fixing

Medium

Toxic

None

C:N Ratio

Low

Fire Resistant

No

Foliage Texture

Fine

Low-growing Grass

No

Resproutability

No

Coppice Ability

No

Bloat

Low

Snail Medick

Growing Conditions

Adapted to Coarse Soil

No

Adapted to Medium Soil

Yes

Adapted to Fine Soil

Yes

Anaerobic tolerance

None

CaCO₃ tolerance

None

Cold Stratification

Yes

Drought tolerance

None

Nutrient requirement

Medium

Fire tolerance

None

Frost-free days minimum

110

Hedge tolerance

None

Moisture requirement

Medium

pH range

5.9 to 7.5

Plants per acre
Precipitation range (in)

18 to 50

Min root depth (in)

12

Salt tolerance

None

Shade tolerance

Intolerant

Min temperature (F)

32

Cultivating

Snail Medick

Flowering season

Winter

Commercial availability

No Known Source

Fruit/seed abundance

Medium

Fruit/seed season

Spring to Summer

Fruit/seed persistence

No

Propagated by bare root

No

Propagated by bulb

No

Propagated by container

No

Propagated by corm

No

Propagated by cuttings

No

Propagated by seed

Yes

Propagated by sod

No

Propagated by sprigs

No

Propagated by tubers

No

Seed per pound

43000

Seed spread rate

Moderate

Seedling vigor

Medium

Small grain

No

Vegetative spread rate

None

Snail Medick

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 scutellata (L.) Mill. - snail medick

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