North America Non-native Plant

Gypsywort

Botanical name: Lycopus europaeus

USDA symbol: LYEU

Life cycle: perennial

Habit: forb

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

Synonyms: Lycopus europaeus L. ssp. mollis (Kern.) Rothm. ex Skalickÿ (LYEUM)  âš˜  Lycopus europaeus L. var. mollis (Kern.) Briq. (LYEUM2)   

Gypsywort: A Wetland Plant for Moisture-Loving Gardens If you’re looking for a plant that absolutely loves wet feet, gypsywort (Lycopus europaeus) might catch your attention. This unassuming perennial herb has been quietly establishing itself across North America, though it originally hails from much farther away. Let’s dive into what makes ...

Gypsywort: A Wetland Plant for Moisture-Loving Gardens

If you’re looking for a plant that absolutely loves wet feet, gypsywort (Lycopus europaeus) might catch your attention. This unassuming perennial herb has been quietly establishing itself across North America, though it originally hails from much farther away. Let’s dive into what makes this wetland specialist tick and whether it deserves a spot in your garden.

What Exactly is Gypsywort?

Gypsywort is a perennial forb – basically, a non-woody plant that comes back year after year. It belongs to the mint family, though it’s not nearly as well-known as its aromatic cousins. The plant produces small, white flowers arranged in dense clusters and has serrated leaves that give it a somewhat understated appearance.

This plant is a European and Asian native that has made itself at home across much of North America. You’ll find it established in states from Alabama to Wisconsin, and it’s also present in several Canadian provinces including British Columbia, Nova Scotia, Ontario, and Quebec.

The Wetland Specialist

Here’s where gypsywort really shows its preferences: it’s classified as an obligate wetland plant across all regions where it grows. This means it almost always occurs in wetlands and absolutely thrives in consistently moist to wet conditions. If you have a soggy spot in your yard that other plants struggle with, gypsywort might actually appreciate it.

Growing Conditions and Care

Gypsywort is surprisingly low-maintenance once you understand its needs:

  • Moisture: Consistent moisture to wet conditions are essential
  • Light: Full sun to partial shade
  • Soil: Tolerates clay and poor drainage – actually prefers it!
  • Hardiness: Thrives in USDA zones 4-8

Plant gypsywort in spring and keep the soil consistently moist. The plant can spread via underground rhizomes, so give it room to naturalize or be prepared to manage its spread if you prefer a more controlled look.

Garden Uses and Design Role

Gypsywort works best in specific garden situations:

  • Wetland and bog gardens
  • Rain gardens and bioswales
  • Naturalized areas near water features
  • Wildlife gardens focused on supporting diverse ecosystems

While not a showstopper in terms of visual appeal, gypsywort offers subtle charm with its clusters of small white flowers that attract various small pollinators including bees and flies.

Should You Plant Gypsywort?

As a non-native species, gypsywort presents a neutral choice for gardeners. It’s not considered invasive or harmful, but it’s also not contributing to native ecosystem support in the same way indigenous plants would.

Consider gypsywort if you:

  • Have consistently wet areas where other plants struggle
  • Want a low-maintenance wetland plant
  • Are creating a naturalized water garden

You might skip it if you:

  • Prioritize native plants for ecosystem benefits
  • Have well-drained garden conditions
  • Prefer more visually striking flowering plants

Native Alternatives to Consider

If you’re interested in supporting native ecosystems, consider these native wetland alternatives that offer similar growing requirements:

  • Wild mint (Mentha arvensis) – another mint family member
  • Blue vervain (Verbena hastata) – striking purple flower spikes
  • Swamp milkweed (Asclepias incarnata) – supports monarch butterflies
  • Cardinal flower (Lobelia cardinalis) – brilliant red blooms

These native options provide similar wetland tolerance while offering greater benefits to local wildlife and pollinators.

The Bottom Line

Gypsywort fills a specific niche for gardeners dealing with consistently wet conditions. While it won’t win any beauty contests, it’s a reliable, low-maintenance option for challenging wet spots. Whether you choose to grow it or opt for native alternatives depends on your gardening goals and priorities. If you do decide to plant gypsywort, you’ll have a hardy perennial that’s perfectly content in conditions that would stress many other garden plants.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Atlantic and Gulf Coastal Plain

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Eastern Mountains and Piedmont

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Midwest

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Northcentral & Northeast

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Gypsywort

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Lamiaceae Martinov - Mint family

Genus

Lycopus L. - waterhorehound

Species

Lycopus europaeus L. - gypsywort

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