I was fascinated by the comments about vermiculite. I use it for seed raising - was doing so with Cactus some 30 years ago. Have just depotted my Arisaemas and packed them in vermiculite for their 6 week cold storage period. Have more recently become very serious about growing exhibition standard Dahlias and the top growers over winter their tubers in vermiculite. I wonder if the difference is this: In all the above cases the vermiculite is not overwatered and is not used for longer than say 3 months. Any feedback will be appreciated. Greg Ruckert 47 Allinga Avenue Glenside 5065 South Australia, Australia Telephone 61 8 83795123 Fax 61 8 83642003