Native Plants

Climbing False Buckwheat

Polygonum scandens var. dumetorum

USDA symbol: POSCD

perennial vine

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

If you’re looking for a climbing plant that’s a bit off the beaten path, you might have stumbled across climbing false buckwheat (Polygonum scandens var. dumetorum). This perennial climber is one of those plants that taxonomists love to shuffle around—it’s got more scientific aliases than a secret agent, including Fallopia ...

Climbing False Buckwheat: A Lesser-Known Climbing Perennial

If you’re looking for a climbing plant that’s a bit off the beaten path, you might have stumbled across climbing false buckwheat (Polygonum scandens var. dumetorum). This perennial climber is one of those plants that taxonomists love to shuffle around—it’s got more scientific aliases than a secret agent, including Fallopia dumetorum and Polygonum dumetorum.

What Exactly Is Climbing False Buckwheat?

Climbing false buckwheat is what botanists call a forb herb—basically, it’s a soft-stemmed plant without woody tissue that comes back year after year. Think of it as the opposite of a shrub or tree. Despite its climbing nature, it maintains that herbaceous character throughout its life.

Where Does It Call Home?

Here’s where things get interesting from a gardening perspective. This plant is native to Canada but has naturalized across a good chunk of the eastern and central United States. You’ll find it growing wild in states from Alabama up to Minnesota, and from Kansas over to Pennsylvania and beyond.

  • Species observed
  • No observations

The Native Plant Dilemma

Since climbing false buckwheat isn’t native to most of the U.S. where it now grows, you might wonder whether it belongs in your garden. The good news is that it’s not currently listed as invasive or noxious, so it’s not causing major ecological headaches. However, if you’re passionate about supporting local ecosystems with truly native plants, you might want to consider native alternatives first.

Growing Conditions and Care

One thing we do know about climbing false buckwheat is its relationship with moisture. Across most regions, it’s classified as facultative upland, meaning it usually prefers drier ground but can tolerate some wetness. In the Midwest and Northeast, it’s even more flexible, happily growing in both wet and dry conditions.

Unfortunately, specific growing requirements, mature size, and care instructions for this particular variety are not well-documented in readily available sources. This might be partly due to taxonomic confusion—many references have shifted to using updated scientific names or lump this variety in with broader species descriptions.

Should You Plant It?

Here’s the honest truth: climbing false buckwheat falls into gardening’s gray zone. It’s not a troublemaker, but it’s also not a native darling. If you’re drawn to less common climbing plants and don’t mind a bit of mystery in your garden, it could be an interesting addition.

However, if you’re specifically looking to support local pollinators and wildlife, you might get more bang for your buck with a native climbing plant suited to your region. Consider these alternatives:

  • Wild grape (Vitis species)
  • Virginia creeper (Parthenocissus quinquefolia)
  • American pipe vine (Aristolochia macrophylla)
  • Native honeysuckles (Lonicera species)

The Bottom Line

Climbing false buckwheat is one of those plants that’s more of a botanical curiosity than a garden staple. If you’re a collector of unusual species or happen to come across it in the wild, it’s worth appreciating. But for most gardeners, especially those focused on native plant gardening, there are probably better climbing options that will provide more documented benefits to your local ecosystem.

Sometimes the most honest gardening advice is admitting when a plant is more interesting in theory than in practice—and climbing false buckwheat might just be one of those plants.

Polygonum scandens var. dumetorum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Polygonum scandens var. dumetorum is also known as:

Bilderdykia dumetorum | USDA symbol: BIDU
Fallopia dumetorum | USDA symbol: FADU
Polygonum dumetorum | USDA symbol: PODU4
Reynoutria scandens Shinners var. dumetorum | USDA symbol: RESCD
Tiniaria dumetorum | USDA symbol: TIDU

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

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

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

Facultative 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)

Facultative 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)

Facultative Upland

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

Facultative Upland

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

Facultative

Northcentral & Northeast ()

Facultative
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: Caryophyllidae
Order: Polygonales
Family: Polygonaceae Juss. - Buckwheat family
Genus: Polygonum L. - knotweed

Species: Polygonum scandens L. - climbing false buckwheat

Variety: Polygonum scandens L. var. dumetorum (L.) Gleason - climbing false buckwheat

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