On Mon, 15 Mar 2004 09:14:16 -0600, "K, T, E & N"
wrote:

What would work? No water, no nutrients. Black thick plastic weighted down
by bricks. Leave through the summer over the area that you want decimated.

You'll have an empty place to 'start over' on. Till in good compost,
aerate, plant it.

Um. Arrowhead (Sagittaria) is an aquatic plant.