In article , "none" wrote:

is this considered a "weed" or a "plant"?

I can see it both ways. As a weed, because it grows like a MF. but also as
a plant, because it can be useful for soaking up excess nitrates and
phosphates.

Chad

A weed is only a plant where you don't want it. The advantage that
hornwort has got over other "weeds" such as duckweed, is that it's easy
to remove.

Mike.
--
Mike Edwardes Tropicals
http://mike-edwardes.members.beeb.net