Doing it a little different this year. Following hints from Craig. A lily pad leaf covering holes in the pot. 2"-4" peat in the bottom of the pot. Cover with sand half way, then lots of fertilizer. What's left of last years 1000 Pond tabs, mostly powder now. When the tabs are gone, I will probably use slow release fertilizer. Way cheaper. Plant lily and cover with sand. For years I used spillway sand. Last two years I used play school sand cause it easy. The lilies clean up very easily. This may not be the best soil for lilies. Other than roots in the muck, it's the easiest. The 5 hardies I have are in clay though. I have not tried them in sand.