North America Non-native Plant

German-madwort

Botanical name: Asperugo procumbens

USDA symbol: ASPR

Life cycle: annual

Habit: forb

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

German-madwort: An Understated Annual You Probably Didn’t Know You Knew If you’ve ever taken a close look at the weedy patches along roadsides or in disturbed areas, chances are you’ve encountered German-madwort (Asperugo procumbens) without even realizing it. This humble annual is one of those plants that flies completely under ...

German-madwort: An Understated Annual You Probably Didn’t Know You Knew

If you’ve ever taken a close look at the weedy patches along roadsides or in disturbed areas, chances are you’ve encountered German-madwort (Asperugo procumbens) without even realizing it. This humble annual is one of those plants that flies completely under the radar, yet it has quietly made itself at home across much of North America.

What Exactly Is German-madwort?

German-madwort is a small, sprawling annual plant that belongs to the borage family. Don’t expect any showy blooms here – this plant produces tiny, almost microscopic blue flowers that you’d need a magnifying glass to truly appreciate. It’s the kind of plant that botanical purists find fascinating, but most gardeners would classify as just another weed.

Where You’ll Find It

Originally hailing from Europe and Asia, German-madwort has become a naturalized resident across a surprisingly wide range of North American locations. You can find it throughout:

  • Most of the lower 48 United States, including California, Colorado, Connecticut, Delaware, Idaho, Illinois, Kansas, Maryland, Massachusetts, Minnesota, Montana, Nebraska, Nevada, New Jersey, New York, North Dakota, Ohio, Oregon, Pennsylvania, South Dakota, Utah, Virginia, Washington, and Wyoming
  • Canadian provinces including Alberta, British Columbia, Manitoba, Ontario, and Yukon
  • Alaska and even Greenland

This non-native species has established itself so thoroughly that it now reproduces spontaneously in the wild without any human help, persisting year after year through self-seeding.

Habitat Preferences

German-madwort is decidedly a dry-land plant. Across virtually all regions where it’s found – from Alaska to the Great Plains to the Eastern Mountains – it maintains an Obligate Upland status, meaning it almost never occurs in wetlands. The only exception is in the Northcentral and Northeast regions, where it’s classified as Facultative Upland, indicating it usually prefers non-wetland areas but might occasionally pop up in wetter spots.

Should You Plant German-madwort in Your Garden?

Here’s where things get interesting. German-madwort isn’t exactly what you’d call garden-worthy. Its flowers are so tiny they’re practically invisible, and its overall appearance is rather scraggly and unremarkable. It’s more of a botanical curiosity than a landscape star.

While it’s not considered invasive or noxious, German-madwort is a non-native species. If you’re interested in supporting local ecosystems and native wildlife, you’d be better served by choosing native alternatives that provide similar ecological functions.

Native Alternatives to Consider

Instead of German-madwort, consider these native options that can thrive in similar dry, disturbed conditions:

  • Native annual wildflowers suited to your region
  • Indigenous borage family members if available in your area
  • Local prairie or meadow species that support native pollinators and wildlife

The Bottom Line

German-madwort is one of those plants that’s more interesting from an ecological perspective than a horticultural one. It demonstrates how successfully some species can adapt and spread to new territories, establishing themselves so thoroughly they become part of the landscape’s fabric.

While there’s nothing particularly harmful about this little annual, gardeners passionate about native plant gardening will want to focus their efforts on species that truly belong in their local ecosystems. German-madwort will continue doing its quiet thing in disturbed areas and roadsides – no gardener intervention required!

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

Alaska

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Arid West

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Atlantic and Gulf Coastal Plain

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Eastern Mountains and Piedmont

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Great Plains

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Midwest

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

Northcentral & Northeast

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Western Mountains, Valleys, and Coast

UPL

Obligate Upland - Plants with this status almost never occurs in wetlands

German-madwort

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

Boraginaceae Juss. - Borage family

Genus

Asperugo L. - German-madwort

Species

Asperugo procumbens L. - German-madwort

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