Due to my unique liner (a free standing pool) and my inexperience building a pond, I have a fair amount of liner showing on the pond side of my flat edging stone. What kind of fast growing plant could I put outside the edging stone to creep over the stone toward the water and cover the exposed liner? I am in New Jersey climate. Looking for a fast growing low plant or vine, I don''t care if it grows into the water a little. I have some ivy, but it grows too slowly.