"jw 111" wrote in message
...
Is there really any reason why builders sand should not be used rather
than
the more expensive horticultural sand, in making up a soil mixture for
pots?

Go to B & Q and buy some of their sharp sand. Do not used anything except
sharp sand and it might be a good idea to wash it with plenty of water
before use. If you're an amateur laying bricks it's best not to use sharp
sand - I tried it, but only once! You could also add a little builders grit
(likewise washed of course) to your mixture if there's a lack of small
stones in the other constituents.

Geoff