Hi I’m in week 4 of flower and I’m using Athena pro line nutrient..everything seem to be going well and the discoloration happened over night . I started seeing the leaves getting lighter and veins are showing.. not really sure maybe magnesium deficiency and how do i correct it..i feed with 5.9/6.2 ph my runoff ph is 5.9 runoff ppm 1700.
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Yes, looking like magnesium deficiency. Are you using a CalMag supplement right now or just the base nutrients you mention? More info: https://www.mrgrowit.com/post/magnesium-deficiency-in-cannabis-plants