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What can I do? Leafs starting to turn yellow. First grower
Hazebergstarted grow question 7 months ago
Yesterday, I noticed some leafs starting to turn yellow and also the tips of the top leafs to be a bit brown. So I watered (nutrition in the desc) and calmag 2 ml, because I thought it might be either lack of PK or cal mg. What else can I do? What about my watering schedule?
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m0useanswered grow question 7 months ago
Looks a bit like magnesium to me.
I don't think its P and doubt its K, but maybe. So stick with the Mg and see how it does in a weeks time. It will take time to green back up. Can also use epsom salts as a source of Mg and S for the plant. It should not progress but if it does it means it might be something else.
The hint of brown tips also might be showing they are being overfed something else. So dial back some of it.
https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg
Good Luck!
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