Chris Hogg wrote in message
...
Apologies for coming in late to this thread, but has anyone tried
using those water-retaining gel granules as a rooting medium (after
they've been well soaked, of course)? I would think they might be
ideal, holding lots of water but allowing air to circulate in the
spaces between.

You would not want air to circulate round the developing roots. they
need to be in contact with moisture all the time.

Mike
www.british-naturism.org.uk