Non-native Plants

Chickenspike

Sphenoclea zeylanica

USDA symbol: SPZE

annual forb

Lower 48 states: non-native, naturalized
Puerto Rico: non-native, naturalized

If you’ve never heard of chickenspike (Sphenoclea zeylanica), you’re not alone! This quirky little wetland plant isn’t your typical garden center find, but it has carved out a niche in certain specialized growing situations across the southeastern United States. Chickenspike is an annual forb—basically a non-woody plant that completes its ...

Chickenspike: An Unusual Wetland Annual for Specialized Gardens

If you’ve never heard of chickenspike (Sphenoclea zeylanica), you’re not alone! This quirky little wetland plant isn’t your typical garden center find, but it has carved out a niche in certain specialized growing situations across the southeastern United States.

What Exactly is Chickenspike?

Chickenspike is an annual forb—basically a non-woody plant that completes its entire life cycle in one growing season. As a forb, it lacks the woody stems of shrubs and trees, instead producing soft, herbaceous growth that dies back each year. The plant gets its unusual common name from its distinctive flower spikes that somewhat resemble, well, a chicken’s spike-like crest.

Where Does It Come From?

Here’s where things get interesting: chickenspike isn’t actually native to North America. This plant originally hails from tropical regions of Asia and Africa but has established itself as a naturalized resident in many southeastern states. It now grows wild and reproduces on its own in Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, Missouri, North Carolina, Oklahoma, South Carolina, Texas, and Puerto Rico.

  • Species observed
  • No observations

The Wetland Connection

If you’re thinking about growing chickenspike, you absolutely must understand its relationship with water. This plant is serious about staying wet! Depending on your region, it ranges from facultative wetland to obligate wetland status:

  • In the Atlantic and Gulf Coastal Plains: Usually found in wetlands but can tolerate some drier conditions
  • In the Caribbean, Eastern Mountains and Piedmont, and Great Plains: Almost always requires wetland conditions

Translation? This plant wants its feet wet—very wet.

Should You Grow Chickenspike?

Let’s be honest: chickenspike isn’t going to win any beauty contests. Its small, greenish-white flowers clustered in dense terminal spikes are more curious than gorgeous. The plant typically reaches modest heights and won’t provide the showstopping visual impact of more traditional garden plants.

However, you might consider chickenspike if you:

  • Have a bog garden or wetland restoration project
  • Enjoy growing unusual or rare plants
  • Need something for consistently wet, muddy areas where other plants struggle
  • Are creating habitat for small insects and wildlife

Growing Conditions and Care

If you decide to give chickenspike a try, here’s what it needs to thrive:

Climate: Best suited for USDA hardiness zones 8-11, matching its current distribution range.

Soil and Water: Consistently moist to waterlogged soil is essential. Think muddy pond edges, the margins of rain gardens, or bog conditions. Regular garden soil, even when kept moist, typically won’t cut it.

Light: Full sun to partial shade, though it seems to perform best with plenty of direct sunlight.

Care: Once established in suitable conditions, chickenspike is relatively low-maintenance. As an annual, it will complete its cycle and die back, but may self-seed in appropriate conditions.

A Word About Native Alternatives

While chickenspike isn’t considered invasive, many gardeners prefer supporting native plant ecosystems. If you’re creating wetland habitat, consider these native alternatives that provide similar growing conditions and often superior wildlife benefits:

  • Cardinal flower (Lobelia cardinalis)
  • Blue flag iris (Iris virginica)
  • Swamp milkweed (Asclepias incarnata)
  • Pickerelweed (Pontederia cordata)

The Bottom Line

Chickenspike is definitely a plant for specialized situations and gardeners who appreciate the unusual. While it won’t transform your landscape with stunning blooms, it fills a specific niche for wet areas and adds an interesting element to wetland gardens. Just remember: this plant is all about the water, so don’t even think about growing it unless you can provide consistently soggy conditions!

Whether you choose chickenspike or opt for native wetland alternatives, creating habitat for water-loving plants adds valuable diversity to our garden ecosystems—and sometimes the most interesting plants are the ones that march to the beat of their own drum.

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

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 Wetland

Caribbean (PR, VI)

Obligate Wetland

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 Wetland

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

Obligate Wetland
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: Campanulales
Family: Sphenocleaceae T. Baskerv. - Spenoclea family
Genus: Sphenoclea Gaertn. - sphenoclea

Species: Sphenoclea zeylanica Gaertn. - chickenspike

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