I’ve done 8 batches of barley koji so far this year. The last ones started to show signs of a little bacteria growth – wet spots in the wood of the growing trays and a slight change in the smell. So, I skip a batch and clean the trays. After a thourogh scrub and rinse (no detergent) I sometimes put them in the oven at 100 degrees C for an hour.

Then start a new batch.

I have made the first 8 batches with the yellow barley tane koji from Higuchi. Now I’ll make some with barley tane koji from Gem Cultures to see the difference. There should be a diff in sporulation and color.

Later I’ll make 2 parallell batches of barley miso with the 2 kinds of koji for comparison.