Denver Plants

Common name: "Willow Grass"
Latin name:
Persicaria amphibia - syn Polygonum amphibium

Willow Grass
Native to: Europe and Asia
Zone:
4 - 8 
Winter hardy:
Yes
Water depth:
12" - 18"
Pond size:
Medium to Large
Flowers:
Yes, pink spikes
Height: 

Spread:
36" or more
Pests:
Aphids, water snails
Sunshine:
Pictured: Persicaria amphibia
Cultural information: "Willow Grass" is an unusual plant. Notice it's last name amphibia. This means it can be grown as a terrestrial plant or as a water plant. It's said that "Willow Grass can be invasive. The above picture was taken at my favorite Northern Pike fishing lake near Granby, Co. Submerge aquatic basket on the pond floor between 12" to 18" deep. Oblong floating leaves can reach 8" - 9" in length. Flower spikes are 3" - 5" long. Remove dead or dying foliage and flowers as they appear.
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