Originally Posted by Richard

There are multiple "banana fuel" formulas.

The 20-5-30 (and other Med-Low-High NPK) are best for producing crops of edible bananas; plus Pit & Pome fruits, brambles, and fruiting vegetables such as tomatoes, eggplants, chilis, etc. An ornamental banana type, esp. Ensetes will not utilize all the potash and overtime you will have a build-up in your soil.

The 28-8-18 (and other High-Low-Med NPK) are best for ornamental banana types, and for fruiting Citrus, Avocado, Guavas, Mangos, and several other fruiting plants of a tropical nature.

The 15-10-30 formula for fruiting bananas is an alternative for people living in a tropical region where nitrogen is more plentiful in the soil environment.