The Grow Awards 2026 π 
Does she has phosphorus deficiency or this is anot...
Experimentgreenanswered grow question 7y ago
Hey there so I'll agree there's definitely signs of magnesium but youve been adding in calmag for the last couple weeks and it looks like it gets a little worse each week. Perhaps the magnesium is present but no able to be taken in either by too much calcium which can lock it out, having your ph below 6 can make it a little less available and also to high potassium can block it out as well. Id say either flush out the system and rewater with the nutrients at 6 and see if it can take in the various nutrients better otherwise id get epsom salt which is just magnesium sulfate and possibly foliar it or just water in...but the roots will definitely have better access to it at the 6ph vs 5.6 and watch for some changes. It may be the slight ph change makes all of your feeding a bit more available. Good luck with ruling everything out. Happy growing βοΈ
Thee_HoffGuyyanswered grow question 7y ago
Hey there Zz! SSo it looks like a Cal-Mag deficiency, but where you have been feeding it Cal-Mag it should be inn the medium. So if your giving it and they are not up taking it most likely has to do with the pH. You may want to try to give it a flush with plain water pH"d to around a 6.4 it should help get the plant to take in the nutes a little easier. Happy Growing!π
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CRiSPrGrowanswered grow question 7y ago
Hey ZZ, that's magnesium deficiency, you can see that from the yellowing between the veins and the necrosis on the side of the leaves like that. Simple problem, simple solution : just add cal mag in the feed , make a cal mag spray and spray on the leaves, and within 10 to 14 days the problem will stop spreading and the plant will have recovered. Hope this helps ! π
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