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Potassium deficiency? Brown spots between veins

Ezzjaybruh
Ezzjaybruhstarted grow question 3 years ago
Someone diagnose this other than potassium deficiency? Never seen these weird brown spots but upon consulting Jorge Cervantes cannabis encyclopedia I’m thinking that’s what it is.. any input would be helpful.
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Week 8
Leaves. Veins - yellow between
Leaves. Other
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Stonerd
Stonerdanswered grow question 3 years ago
I actually believe that this is a Calcium (Ca) toxicity, usually with just Potassium (K) deficiency older and middle leaves turn pale green before suffering chlorosis and blotches, in your case top and middle foliage is dark green. Calcium toxicity also inhibits Potassium uptake among other nutrients but since it's a mobile macro-nutrient it shows signs first. Stop using all Calcium additives and monitor the plant daily for any improvement, your "MaxiBloom" fertilizer already has enough Calcium in it for your plants. Don't forget to balance pH at correct levels (5.5-6.5) and water with runoff! Hope this helps! Good luck and happy growing :)
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GODSGIFT_2005_JM
GODSGIFT_2005_JManswered grow question 3 years ago
Also consider toxicity could be the culprit, and it’s a micro nutrient not a macro nute because problems ate on the upper part of the plant. Possibly CAL/MAG
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GODSGIFT_2005_JM
GODSGIFT_2005_JManswered grow question 3 years ago
Hi I’ve taken a quick look. Consider light burn, top part is too yellow. In such case distance the growlamp
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