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Pond Calculators
Persicaria amphibia
Description: Produces elongated, lance-like mid to dark-green leaves. The small pink-purple flowers develop in dense clustes on erect stems.
Other Common Names: Water Knotweed, Water Smartweed, Amphibious Bistort, Heart's Ease, Water Buckwheat.
Origin: Native to many parts of North America, Europe and Asia.
Water Depth: 50cm.
Spread: 200cm.
Flowers: June - September.
