All rainy season we have been fertilizing the baby coffee and the adult plants almost every month. Each time a slightly different mix depending upon the leaf color and how we think they are doing.
First one must work out what is required. Initially the soil test gave the right indication, after that it seems to be guess work based upon an experienced eye regarding the color of the leaves and so on.
Once the right mineral deficiency has been identified, then the not so fun job of finding it and the logistics of transporting it to the farm.
As I am the only one that drives around here, that not such fun job falls to me. If I am lucky, the magical formula is available already in a local sore, or the next best thing - the very nice man at the Coop can get it delivered. If not, then down the mountain I have to go.