In article ,
says...
When the book calls for Horticultural grit or sharp sand. Will building
grit and sharp sand do instead ..I know it seen
ms to be frowned on but ordinary sharp sand is used on football
pitches...Wondered if the horticultural label was just to relieve us of
more money ?

It depends on where you are in the UK, here in Cornwall all the
horticultural grit and builders grit are the same, washed china clay
waste which natuarally has no lime and the clay has been washed out, but
elsewhere builders sand can contain lime, salt and/or clay which makes it
unsuitable
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea