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  1. T

    Adding extra N and P when using TPN+

    Just wondered if anyone adds extra N and/or P when using TPN+? My UG and to a lesser extent HC look quite yellow and when Ive grow HC in the past, this appearance has been due to lack of N. Given that TPN+ is quite lean in both of these, I have thought about adding extra? Currently adding...
  2. T

    Extreme nitrogen deficiency

    Could this be extreme nitrogen deficiency which I read can cause older leaves to die off very quickly in extreme cases? Cheers Sam
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