A couple of leaves have turned white.

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I am gonna say it might be a phosphorus deficiency, being in flowering. Went to check feed. But section was not filled out.

Yup I’m leaning towards an unusual mutation. But maybe someone else can chime in that has seen it all.. but I think you’re fine everything else looks pretty healthy

Hey this might be one of two things I can think of. Sometimes leaves will mutate like this and show an almost variegated like effect. Or two tone leaves. Other times leaves that are to close to the lights will get a bleached effect to them. its normally seen on the whole leaf and on the top most buds this link shows some of the mutation you may experience in growing cannabis. https://www.growweedeasy.com/7-common-cannabis-plant-mutations I'm leaning toward two toned leaves as your buds are not bleached white and plants looking healthy otherwise. Best Of Luck and Happy Growing!

@DoomSlayer hi mate any chance you may have accidentally spilt something on those leaves? perhaps when feeding? thats what the leaves look like to me anyway