Water plants are like any other perennial, they're rather costly
to purchase, but multiply so rapidly that within months you'll have
an overabundance to spread around or try to give away.
Each year, by early August, potted water plants are outgrowing
their pots. I separate them by cutting the roots with a sharp knife
and repotting each new plant in their own pot. I've never liked
the smell of wet dirt after it's been under water for months, so
I pot only in pea gravel. The plants do great, repotting is easy
and not smelly at all.
OK - here's the easiest water garden: Fill a large Styrofoam or
plastic pot with water, add your potted water plant, a few floating
hyacinths and lettuce or some duck weed. If you have baby fish and
the pot is large enough, this is a perfect safe home for them.
Pictures to the left: Froggy was "adopted" in 2000 as
a tadpole. We watched as he grew his legs, lost his tail, and learned
that he could climb in and out of the water. We don't know where
he went in the winter, but there he was, early in the spring, when
we were cleaning away winter debris in the pond.