Hornleaf Riverweed
Podostemum ceratophyllum
Last reviewed: July 2026
Light
part sun
Water
high
Size
1"–12" H × 2"–18" W
Bloom
N/A
Native to
AL, AR, CT, GA and 19 more states
Hornleaf riverweed is an aquatic native plant that grows naturally on rocks in fast-flowing streams and rivers. This unusual perennial forms moss-like mats with finely divided, feathery foliage that remains submerged or semi-submerged in moving water.
In an HOA neighborhood
Hornleaf Riverweed takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
- Requires flowing water habitat
- Not suitable for typical landscaping
- Only grows in streams and rivers
Wildlife value
This specialized aquatic plant provides habitat for stream insects and small fish. It helps maintain water quality and stream ecosystem health in its natural habitat.
Common questions
- How much sun does Hornleaf Riverweed need?
- Hornleaf Riverweed grows best in part sun conditions.
- Where is Hornleaf Riverweed native?
- Hornleaf Riverweed (Podostemum ceratophyllum) is native to AL, AR, CT, GA and 19 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Hornleaf Riverweed HOA-friendly?
- Hornleaf Riverweed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Hornleaf Riverweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz