John - You might consider looking at a product called Turface. Here is a URL: http://profileproducts.com/index.cfm/?lp=gb&bhcp=1 It was recommended to me by Jason Delaney at MOBOT for lightening up my clay soil and I think it's great stuff. Linda Wallpe Cincinnati, Ohio From: "John T Lonsdale" <firstname.lastname@example.org> Subject: [pbs] Perlite substitute? Is there anything out there that anyone has practical experience with that I can substitute directly for the perlite? ________________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value/ to sign up today!