Hornwort. Picture courtesy of NIWA

These plants leaves will float under the water with their roots planted in a pot. They can be left in your pond for the winter if you do not add salt to your pond. If. They like to be under water and add oxygen to the water.

• Anacharis
  
• Foxtail  
  
• Hornwort (AKA Coontail)
  
• Sagitaria - dwarf 
  
• Vallisneria - American 
  
• Vallisneria - corkscrew  
  
• Vallisneria - giant  
  
• Vallisneria - Italian
  

Italics indicate a semi-hardy plant (zone 6)

PLANTS

PERENNIAL SUBMERGED GRASSES