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Re: maximum depth for val.
On Mon, 31 Jan 2000, Tsuh Yang Chen wrote:
> i'm trying to help the folks at the brooklyn botanic garden re-do their deep
> pond with aquatic plants. i was wondering how deep can vallisneria be
> planted and still thrive. Vallisneria gigantea grows in my tanks like a weed
> and form these long ribbons on the surface. this pond is almost 10 ft deep.
> how low can it be planted? does anyone know?
> tsuh yang chen, nyc, USA
According to the data in Davis and Brinson, V. americana does not grow in
nature at depths greater than about 8 feet. I suspect V. gigantea will be
the same. I assume that light at depth is the limiting factor, so the
maximum depth should be reduced for light levels less than natural
incident light and for poor water clarity.