Hey OS, the next time you make up some soil try this with your mix.... ASHES. You can even sprinkle some on the top and each time you water, some sinks into the soil for freshening. Stuff works great, water soluble and lots of nitrogen and potash. Been using it on outdoor plants for decades, give it a try and let me know what you think. Don't know why I haven't done this sooner to the mix. And oh yeah, a little bit goes a long way.
ill try it on my next batch..
ashes are carbon right..cant be bad..thanks for the tip..lookin good