Pond Boss Forums AQUATIC VEGETATION Balance of plants in the environment Where can broadleaf pondweed be purchased?

I received more info from the biologist:

Large leaf pondweed is Potamogeton amplifolius, and clasping pondweed Potamogeton richarsonii would both work, but they only grow naturally in the northern third of the state and northward, in the natural lake regions.

(Indiana)

Those would be the species of broadleaf we are looking for.