GW:
Alligator weed will die in deep water, but it can survive, even thrive out of the water, mine has actually spread out of the water and climbed up the bank about 5 to 10 feet. If you stay on top of the weed problems from the beginning, it won't get to bad.
Alligator weed does die quickly when in deep water, when we got about 3 or 4 inches of rain in a two week period the water level rose about 6 inches, and all the deepest weed turned brown and began to die off.
Good luck.
