soup wrote:
Hi all
I am making a box (5' x 20" x 9½")for tomato plants, it will be
filled with gravel with the tom. pots sitting on top. I will be putting
water into the stones to allow the tom. roots to reach down and so
water themselves. This box will be made of OSB (Sterling board)and will
have some form of liner between it and the wet stones was thinking of
using a pond liner to line the box but one of the right size will be in
the £18~19 range can I just use tarpaulin (in the £5 region for the size
required) to line this box? Or should I just bite the bullet and pay for
a pond liner?

Thanks all shall investigate the 'waterproof membrane' route.