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thomas1998started grow question 4y ago

hello, I've had yellow tips + brown spots on the leaves since last week. I've already harvested the nutrients for 7 days but it hasn't helped.. what could this be? (see dos si dos & apple fritter diary)

thomas1998

thomas1998

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Leaves. Color · Black or grey

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GrowingGrannieanswered grow question 4y ago

This is most likely a phosphorous deficiency here... certainly not over-feeding. At this stage, you should be upping your PK amounts, not lowering them - but don't add any more nitrogen... Good luck!

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LottaBudsanswered grow question 4y ago

It is an overfeeding issue, and if this happens just lowering the nutes doesn't help but you should go water only for at least a week. I see you're also still giving 1ml/l of Biobizz calmag, that's a pretty heavy dose. You need to solve the lockout before you give anything more to it.

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