I have grow water lilies and Lotus for decades using water
pots. There are many sizes available of these from
such as "Lilypons".
Also, while I'm not advising on a medium for aquatic aroids, I
can confidently report one of the best media for Nymphaea
Lotus is the heavy red clay soil of the US Southeast.
muck in the pond is called muck and made up of more than
fish waste ... the roots of my plants love it as well when it
accumulated enough :-) .
We cover the top of the clay soil in the pots with
gravel. The aroids
along the margins thrive in this.
Have you tried these water gardening techniques and have you
read any of the information from Lilypons?
I would love to hear.
In a message dated 10/15/2009 12:30:00 A.M. Central Daylight Time,
I have had very
varied success with Nymphaeas. The books say large containers with no
holes and NO animal manure; only good topsoil. Then you have to keep
giving fertilizer (the Nymphaea fertilizer is EXPENSIVE) or the plants start
decreasing in size.
But I observed
that a yellow nymphaea which had grown over the edge of the pot, had sent
roots spreading in all directions in the gunk on the concrete floor of the
pond (largely fish excrement). And the lily went wild! Huge leaves
So I started
putting nymphaeas in fairly wide, but very shallow plastic containers,
reasoning that the roots like the aeration on the surface of the soil medium.
I use cat litter trays or shallow “wash pans” (pre-washing
machine). In the bottom I put 4 inches of well-rotted pig manure, topped
by 4 inches of loam. I plant the nymphaea in the centre and cover the
loam with sand. Then I gently submerge the container in the 18 inch deep
pond, but not keeping the crown 6 to 8 inches below the water surface,
as the books tell you to