David - Thanks for info. I aim to hit my local builders' merchants pronto! - Can I trouble you a bit further, to tell me (a) what form/quantity the stuff comes in when you get it from the merchants (by the bagful? what does it actually LOOK like?), (b) how do you then convert it into pot-sized portions for your horticultural purposes? is it a solid lump? does it need cutting or dividing? or is it just a loose amalgamation of fibres to begin with? TIA Tim Tim Longville