Broad-leaved pondweed (Potamogeton polygonifolius)
Care, watering, light and tips for Broad-leaved pondweed on Floravia.
Quick facts
- Family: Potamogetonaceae
- Difficulty: Demanding
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
About Broad-leaved pondweed
Potamogeton polygonifolius, commonly known as bog pondweed, is a submerged or floating aquatic plant native to temperate regions of the Northern Hemisphere. Its leaves are lance-shaped and float on the water's surface, creating an attractive cover. It is ideal for ponds, shallow water bodies, and naturalistic aquariums, providing a touch of greenery and shelter for aquatic wildlife.
Native range
Europe, Northwest Africa and Macaronesia
Care tips
It requires full sun to partial shade for optimal growth and adapts to a wide range of water conditions, though it prefers clear, slightly acidic to neutral waters. No watering is needed as it lives submerged or floating. The ideal substrate is the pond bottom or a nutrient-rich aquatic substrate, anchoring its rhizomes to prevent it from floating freely. A common mistake is planting it in overly turbulent waters, which can damage its delicate leaves.
How to save a dying Broad-leaved pondweed
- Warning signs
- Soft, transparent, or discolored leaves, limp stems. No new growth.
- First aid
- Ensure clean, oxygenated water. Check substrate for rot. Trim damaged parts.
- What kills it
- Stagnant, anaerobic, or polluted water. Lack of light or nutrients.
- Can it be saved?
- Yes, if healthy parts remain. Improve water quality and substrate. Requires patience.