re: Fertilizer for Nerine Jim uses. I looked everywhere for any fertilizer remotely similar to the one you use (cannot mix my own) and the only one with potassium similar to the formula you gave is the tomato fertilizer. Nitrogen is way higher to "0" of your formula, but it is low as they go in commerce. I suppose that if I bought a box of nitrogen and a box of potassium I could theoretically mix my own if I knew how, but it would not be water soluble as the only ones sold separately are granular. Would you go wit the tomato thing in a pinch? Bea in Ontario zone 5