I don't understand this
Ina Crossley (Tue, 26 Feb 2013 19:38:34 PST)

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

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Ina Crossley
Auckland New Zealand zone 10a