On Fri, 04 Apr 2014 10:02:08 +0100, David Hill
wrote:

I am thinking about using it in green house on heated sand bed.

I just wonder why?
Normally a heated sand bed is used chiefly as as propagation bed and as
such doesn't have trays etc on it for any great time.

I run a three heated sand beds, throughout the winter, raising fuchsia
cuttings, as they root, they are moved off the bed, to make room for
the next lot. The beds create enough heat to keep the greenhouse frost
free, (its well insulated)

For capillary matting you could try http://www.lbsgardenwarehouse.co.uk/

BIG roll :-)

for too much for one small greenhouse, must be a DIY project in the
making, Geoff Hamilton or Bob Flowerdew, would be cutting up some type
of throwaway household item to substitute.

..

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Lincolnfuchsiasociety.info

(Any Olympic GameMakers here?)