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Starting to have an issue with the Industrial plan...
DangPalstarted grow question 6 years ago
Starting to have an issue with the Industrial plant. Lower leaves are showing a number of bronzey brown spots with edge burn. Any ideas? I think it might be a magnesium issue because it appeared as the plant started flowering. Picture of the leaf above. Fan leaf stems are purple.
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Silverback_Guerillaanswered grow question 6 years ago
I'll bet it's just a PH issue making it seem like the beginning of a Calcium deficiency. Just flush with an extra half gallon of water and your normal nutrient solution, but be doubly sure that your PH is around 6.2..maybe recalibrate your PH pen..
It coud also be that you're having root problems on that plant. They will manifest themselves as a deficiency, and if you know you've been feeding them properly and that the PH is absolutely correct, that's probably the problem.
You can try aerating the pot by using a skewer or somethhing thing and pointy to poke and prod the soil to loosen it up.
You may need to just transplant into a pot with more coco or perlite..some plants just need an airier soil.
OutForRealanswered grow question 6 years ago
I would say calcium deficiency on a early stage. Magnesium would have created an a yellowing between the veins. The rust sports are related to a Calcium def of a potassium deficiency ( but potassium def is also leading to yellow edges of the leaves ). I also suspect you plant to have a nitrogen abundance si it can be hard for her to have access to the other nutrients , maybe a light flush and a new feeding with less N could help
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