andrew lenden

anything suitable for aquariums is most likely to be safe as it would harm the fish if it altered the ph. this can be a good source as you can rummage through and pick the shape you are after. also try garden centres which sometimes stock waterworn limestone which has nice fissures and again you can rummage but in my own experience is limited to junipers, elms and yews that,ll do well on limestone.If you buy online you are probably limited to one piece which may be the wrong shape for the tree when it arrives. greenwood gardens (uk) used to stock ibigawa rock at a price. i have a good source of chinese cemented rock structures that when broken up can provide some useful and interesting rocks for root over rock. ultimatly the best option though is to get out into the hills! cheers, andrew