"houndsy" wrote in message
o.uk...
Is it possible to grow watercress in the soil, or is running water
required? I'm in London. 6 inches of nice friable soil, then solid clay.
Can I use the watercress that I would buy at the supermarket?


I've grown it in a plastic box.
You need a box with NO drainage holes. I put at least an inch of gravel in
the base, fill three quarters full with compost/soil mix. Plant the
watercress - I use supermarket plants. Keep waterlogged. Works for me.

--
Kathy