Has anyone tried this product by Espoma? It appears to be a "perlite" substitute... http://www.espoma.com/pdf/SoilPerfector.pdf It is similar in structure to fullers earth, commonly referred to as turface in the sports turf management arena (theirs is a smaller particle, whereas the Espoma type is quite large) Also, a product called Dri-zit http://www.waverlyminerals.com/Dri-Zit.htm sold through the Automotive chain Advance Auto parts is made from a coarse granule fullers earth. there may need to be some experimenting done with these types of substrate for "bulbs" etc...I have been using these substrates for several ears now in my bulb potting mix with good results. Cheers J.W. in Georgia --------------------------------- Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1ยข/min.