I was reading an article which was about scientific writings which included Zephyranthes. One comment at the end was: "From this study it was concluded that preferred conditions for both species were fertigation of twice a week using fertilizer rate of 150 ppm N under full sun" This is in reference to both Habranthus and Zephyranthes. What does 150 ppm N mean? I know that would be nitrogen, but how would one know that quantity? Fertilising twice a week seems a lot to me, but I would be happy to try it, as long as I knew what I should use. I thought fertilisers had always more than nitrogen in it. Ina -- Ina Crossley Auckland New Zealand zone 10a