True "deep water" plants can survive with 4 to 10 inches (or more) of water over their crowns.
: Digging a ledge approximately 1 foot deep and 12–18 inches wide around the perimeter allows for marginal plants like Iris or Pickerel . water gardening
: Use weighted pots or baskets to prevent plants from floating and consider using plain clay cat litter topped with pea gravel to keep soil from washing away. Are you planning to build a new pond from scratch, or True "deep water" plants can survive with 4