Non-native Plants

German-madwort

Asperugo procumbens

USDA symbol: ASPR

annual forb

Alaska: non-native, naturalized
Canada: non-native, naturalized
Greenland: non-native, naturalized
Lower 48 states: non-native, naturalized

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 ...

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.

  • Species observed
  • No observations

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 care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants 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. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Alaska ()

Obligate Upland

Arid West (AZ, CA, CO, ID, MT, NV, NM, OR, TX, UT, WA, WY)

Obligate Upland

Atlantic and Gulf Coastal Plain (AL, AR, DC, DE, FL, GA, IL, KY, LA, MD, MS, MO, NC, NJ, OK, PA, SC, TN, TX, VA)

Obligate Upland

Eastern Mountains and Piedmont (AL, AR, DC, DE, GA, IL, IN, KS, KY, MD, MO, NC, NJ, NY, OH, OK, PA, SC, TN, VA, WV)

Obligate Upland

Great Plains (CO, KS, MN, MT, NE, NM, ND, OK, SD, TX, WY)

Obligate Upland

Midwest (IL, IN, IA, KS, KY, MI, MN, MO, NE, ND, OK, OH, SD, WI)

Obligate Upland

Northcentral & Northeast ()

Facultative Upland

Western Mountains, Valleys, and Coast (AZ, CA, CO, ID, MT, NV, NM, OR, SD, UT, WA, WY)

Obligate Upland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
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