A deep water plant, Water Hawthorne, genus Aponogeton distachyos grows from small bulbs, with floating leaves that are narrow and long, growing 3 to 6 inches in length and lying flat on the water surface.
A South African native known as Cape pondweed, the plant will grow in 6 inches to 2 feet of water and has no disease or insect problems that are known.
The plant will grow in hardiness zones 6 to 9 in full sun or part shade, loves the cool water.
The flowers bloom in the spring, are dormant in summer, and then bloom again in the fall until the pond freezes over, are very fragrant, sweet like vanilla, white, almost orchid-like with maroon seeds. Self seeding or can be grown from tubers.
Planted in fabric pots, and inch deep in heavy clay soil, and fertilized monthly the flowers are actually edible, can even be purchased canned.
Stew made of this plant is a Cape of South Africa dish made with lamb, potatoes and onion, and the flower can be pickled and or used in salads.
Winterize the same way that you would a hardy water lily. Once, the plant dies off by frost, place the pot in the deepest part of your pond to keep the tubers from freezing.