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Yellowing Leaves? Nutrient deficiency? Fixable?
thedankestdankstarted grow question 4 years ago
Is this a nutrient deficiency? I'm 3 weeks into flowering. 2 or 3 weeks away from harvest. I'm using Biobizz Grow, Bloom and Top Max. Is it an issue that can be fixed? Or do I just need to get it right next time?
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CRiSPrGrowanswered grow question 4 years ago
hey there, what you're seeing is nitrogen lock out. Too much N led the plant to lock out , that's why you see yellowing starting from the base of the leafs going outwards starting with the oldest leafs first (because the plant isnt getting any N, because there's too much N, it's cannabalising the N from its own leafs) . You need to flush by watering with plain water until run off then adding like 20-30% more water than what you used extra. Remember in soil you should be feeding plain water twice then nutrients once. Meaning water water feed water water feed... you're only feeding once every ten days or so. Here the nutrients built up that's why this happened. Hope this helps ! 🚀
GMSgrowsanswered grow question 4 years ago
Leaf tip are straight. A little wilting going on. That would be overwatering. Have to let potter get dry 2 inches down before watering. Ec should be around 1.2 which is 600 rpm on the hanna scale. They look like their overfed. I would also move that led up a foot. Good luck...
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DeadwebsiteBoringcommunityanswered grow question 4 years ago
This is the second question like this is a row... This is not a case of deficiency this is a case of overfeeding. But I could be horribly wrong just my first guess. All the organic stuff sure is great but it's really easy to saturate a plant with nutrients and I have a feeling you'll feel the same way as I do if you really stop and think about it.
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rhodes68answered grow question 4 years ago
I see calcium def as well which may be the worst of it, Nitrogen typically starts low moves high, this looks like the opposite.
CA def will make a plant light burn very easily, had one do exactly that.
Try a Cal-mag foliar feed clear up the CA and the rest may also clear, check you light height.
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ijustdontgiveafanswered grow question 4 years ago
Hi there.. yellowing of the lower leaves is usually due to a N deficiency.. Especially at the beginning of flowering, when the plant goes into the stretch, there is still a need of N, but many people already switch to bloom-nutrients "because the plant is now in bloom", that are low on N, because that's not required for bud-growth. I would imagine that was the case here as well..
Bloom nutrients should be given, once the plant stops growing in length (so after the stretching-phase at the beginning of bloom).
happy growing!
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