Horned Pondweed
Zannichellia palustris
- Native to:
- Afghanistan, Albania, Algeria, Argentina, Australia, Austria, Baleares, Baltic States, Bangladesh, Belarus, Belgium, Bolivia, Botswana, Bulgaria, Canada, Canary Is., Chad, Chile, China, Colombia, Corse, Cyprus, Czechia-Slovakia, Denmark, East Aegean Is., Egypt, Finland, France, Germany, Greece, Gulf States, Hungary, Iceland, India, Iran, Iraq, Ireland, Italy, Japan, Kazakhstan, Kirgizstan, Korea, Kriti, Krym, Kuril Is., Lebanon-Syria, Libya, Madagascar, Mexico, Morocco, Myanmar, Namibia, Nansei-shoto, Nepal, Netherlands, New Zealand, North Caucasus, Norway, NW. Balkan Pen., Oman, Pakistan, Palestine, Peru, Poland, Portugal, Prince Edward I., Rodrigues, Romania, Russia, Sardegna, Saudi Arabia, Sicilia, South Africa, Spain, Sudan-South Sudan, Sweden, Switzerland, Tadzhikistan, Taiwan, Tanzania, Transcaucasus, Tunisia, Türkiye, Türkiye-in-Europe, Turkmenistan, Ukraine, United States, Uzbekistan, Yemen
Christian Fischer
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Potamogetonaceae
- Genus:
- Zannichellia
- Species:
- Zannichellia palustris
- USDA Symbol:
- ZAPA
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 100 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- may,jun,jul,aug,sep
Garden & Ecology Notes
- Wildlife Value:
- waterfowl, fish
- Deer Resistant:
- Yes
- Salt Tolerant:
- Yes
Soil Requirements
- Soil Type:
- nutrient-rich, silty or clayey soil
- pH:
- 6.0 - 8.0 (neutral to slightly alkaline)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Common in freshwater and brackish environments
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–42 days
- Notes:
- Seeds germinate underwater in shallow, calm water. Light may enhance germination.
The above propagation data sourced from Claude AI