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Week 8 (4 weeks into flowering) - Possible Nitrogen / Cal-Mag issue?
BavarianBarbarianstarted grow question 5 months ago
Plants show signs of what i assume to be a deficiency. Stopped feeding nitrogen Week 7 according to schedule. Symptoms are not on every leaf but some the upper foliage. Yellowing, burnt tips and rusty spots. My guess is lack of Cal-Mag & Nitrogen. Is my guess correct?
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Leaves. Tips - Burnt
Leaves. Curl up
Leaves. Color - Yellow
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Gnrlymsntrp81answered grow question 5 months ago
Calcium defficiency and a bit too much light.Also salt burn is a possibility because of the burned edges. I think you got salts accumulated in your medium that lock out cal/mag.
Organomananswered grow question 5 months ago
Definitely a severe calcium deficiency.
Plants are also hungry for potassium and phosphorous.
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Scrubbyjimbobanswered grow question 5 months ago
Nitrogen deficiency will show up at the bottom of your plants before newer growth. Check your runoff pH and EC/ppm, it's probably a pH swing in the media or salt buildup issues.
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