I have been looking for a fertilizer for Japanese maples. It is hard to find a fertilizer that has low nitrogen out there. I was considering using osomote rhododendron food but end up getting the foxfarm fertilizer instead. I have scanned the label and hopefully the experts will chime in about whether this is a good fertilizer for Japanese maples or not. My property is small enough that I grow my maples in akaline condition (i.e. soil close to concrete pavement or patio). The acidifier is welcome in my case. I have applied to my maples in the ground only. My potted JMs are young and I don't want to push them until they have a bigger root system. The chart tells you to use quite a lot of it and the 4 lb box does not last long if applied per directions.