I have never had a problem. I buy the fertilizer tabs that are made
specifically for ponds. I poke the tabs into the soil a few inches and then
cover it up. I fertilize once a month during growing season.
"YSL" wrote in message
...
My waterlilies are not quite good this year, not many flowers and the
leaves
are small too.
I intend to fertilise them but am afraid of algae booming. Any ideas, we
are
in middle of summer at the moment. Cheers.

YSL