naoki
Well-Known Member
I've been using left over charcoal from wood stove (birch is the wood). Sifting the ash is kind of messy, though. pH might not be so important for epiphytes, but I try to add it for plants known from more alkaline soil. I haven't compared the pour-through to see if it really makes difference, though.
I also wonder if charcoal contains some residual Karrikinolide (Kar-1), and whether it may have a positive effect. That is a relatively recently found bioactive component of smoke water (people use it for germination of Australian plants).
I also wonder if charcoal contains some residual Karrikinolide (Kar-1), and whether it may have a positive effect. That is a relatively recently found bioactive component of smoke water (people use it for germination of Australian plants).