Hi, I'm new to lilies and would like any suggestions for a couple of plants to combine with my lilies. They are stargazers. I have them near the edge of my pond. I would say it's part sun there. So far I have some coneflowers, and catmint near by, also a white phlox. I've looked at some of the beautiful pictures here, but trying to think of something that won't get too tall, it could be a small shrub (under 2 feet), perennial or annual. Thanks so much!