"bruce" wrote in message
...
I have an allotment with a very clay soil. Plenty of muck and compost helps
but I believe that I need to add some coarse grit or sand to help break it
up. Horticultural sand is quite expensive so can I use builders sand or is
it treated with chemicals that would harm my soil and vegetables? Or has
anyone got any other suggestions?



if u can get it gypsum is the best thing and its relatively cheap