On Sun, 23 Sep 2012 19:56:27 +0100, David Hill wrote:

Oh dear, how many times do I have to say that I don't intend to grow
it *in* the water!

I'm not sure how you propose to grow watercress without it being in
the water. It's an aquatic/semi aquatic plant...

It is quite possible to grow watercress in trays if they are kept damp
with misting

And where is this misting water coming from?

--
Cheers
Dave.