XMO if a soil has bad drainage, char is NOT something you want to add. as it holds moisture even longer.
lol when i wrote the line "i do think char has big benefits" i started off on a long "but,~" dialog that i thought better of.
IDK, i m envisioning container gardening w/ this product and i dont understand why they suggest it might be OK to not have drainage - let alone encourage using the charcoal to compensate???