Ros Butt wrote in
:

We're going to give a try to capillary matting for the seed pots in
the greenhouse this year, instead of gravel in the trays and would
appreciate any advice as to the best way to water? (without buying the
fancy kits etc)

many thanks
Ros

You might not need fancy kits if you learn what capillary means.
Any fancy kits can be made easilly at home.

This is not meant to be sarky or anything, you just need to understand how
it all works, then you won't be paying £x for a sponge, because that is
what it may be, a sponge.

Baz