Vermiculite makes a very moisture retentive mix, I find that perlite does the same job but there is more air in a perlite mix than in a vermiculite one, I use these for stratification, forced germination and rooting of moisture loving plants. I get more fungal problems with vermiculite. On Thu, Jul 12, 2012 at 4:48 PM, Randy.R <steyrhahn@yahoo.com> wrote: > Lots of suggestions for growing medium. > > I don't see Vermiculite in anyone -elses- medium. Is there a reason for > that? > >