10-05-2010, 05:50 AM
Bananas (the fruit) are rich in potassium, and it has to come from somewhere. If you fertilize, use a fertilizer high in potash (the K in N-P-K). Or you can mulch with the dead banana leaves and cut up trunks. If you burn wood trimmings, the ash from the fire is also a good source of natural potash and you can topdress your plants with it.