we get ours from woodford sjw mushrooms pty ltd there is a long wait list on this at the moment so would also be interested if anyone can find closer and more easily available source
Here's a supply of mushroom compost: Caboolture.
if you buy it direct from Woodford its $1 a bag and you cab still get several weeks crop from the bags before you use it in the garden ! $36 a trailer load or they can bring you a whole truck load for about $300 plus bit extra delivery depending where you are - thats about 50c a bag plus delivery
$36 a trailer how big can the trailer be .
sorry thats what it costs u in a borrowed trailer that fits 36 bags - $1 a bag - ask them 0 it becomes cheaper if yu buy even more -