Thanks for your question. Adding bokashi bran to your potting soil will give your seedlings a perfect start. Add approximately a cup of bokashi bran to every cubic foot of soil, mix and use the soil as normal.
The information you refer to is slightly misguided. It is the bokashi pre-compost (bokashi’d food waste) that is acidic, not the bokashi bran itself. We recommend that plant roots are not exposed to the bokashi pre-compost until it has had a two week period to assimilate into the soil. However, the bokashi bran can be mixed directly with your potting soil (or any other soil) and used immediately for seedling (or any other plants).
Hope that helps. Feel free to ask any more questions you may have.
The Bokashi Living team