Amphibious bistort (Persicaria amphibia)
Care, watering, light and tips for Amphibious bistort on Floravia.
Quick facts
- Family: Polygonaceae
- Difficulty: Moderate care
- Watering: every 2 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Amphibious bistort
Persicaria amphibia, also known as amphibious bistort or water knotgrass, is a versatile perennial aquatic plant capable of growing both submerged and emergent. Its leaves can vary from lanceolate to ovate, and it produces spikes of pink flowers that float on or emerge from the water, creating an attractive visual in ponds, lake margins, or wet garden areas.
Native range
Northern Hemisphere (North America, Europe, and Asia)
Care tips
This plant thrives in full sun to partial shade conditions and prefers wet, muddy soils or even submerged in up to 50 cm of water. Watering is not a concern if grown in an aquatic environment, but in soil, it requires constant moisture. A common mistake is planting it in dry soils, where it will not be able to develop its full potential and may wilt.
How to save a dying Amphibious bistort
- Warning signs
- Wilting or yellowing leaves, soft stems. Stunted growth or no flowering.
- First aid
- Ensure constant, fresh, clean water. If potted, a water tray is ideal. Improve light if scarce.
- What kills it
- Prolonged drought or dry soil. Also insufficient light.
- Can it be saved?
- Yes! It's resilient. With proper water and light, it will recover quickly.