I would put a med. size hardy lily 12 to 18 inches and a min. lily about 6
inches. I would put a min. cat tail 1 inch below water. NOTHING that you
describe should go on the pond floor Jerri

http://www.fringeweb.com/Ponds/JerrisPond

I agree completely. I only have one lilly that has its crown 18 inches
from the water surface, and it is a very large lilly that thrives at
this depth. My other lillies are around 12 inches. They have only been
breaking the water surface for abou a week here in Michigan.