Originally posted on Michael Hagedorn:
This is a legitimate question. My master Shinji Suzuki never used lava (aka scoria), preferring just akadama and pumice. On coming back from Japan in 2006 I continued using the akadama / pumice mix and have always had strong, fine root growth with dense root masses. Several lava stories have stuck with me over the years. Joe Harris III reported… Continue reading Is Lava Good For Bonsai?