We have a small homestead in the mountains of Jawa Island Indonesia and we have tried growing potatoes without much success so far I have narrowed it down to 3 problems 1. Not enough sun(I fixed that) 2.Using determinate potatoes in a barrel setup(Looking for other types) 3. Fertilizer, well we tried just mixing some normal soil with cocopeat and goat poo but it is still not giving good results.
So my question is this:
How do I make the best fertilizer from what we can find on our homestead and how to apply it best?
We have goat poo, rabbit poo, ashes from wood stove, human pee, coco peat, rice husks. We do have some worm castings on top of our grow beds that we usually collect to make a general liquid fertilizer.