Calcium or magnesium deficiency?

SeedlockHolmes
SeedlockHolmesstarted grow question 4y ago
Cal mag def? Photo of new growth affected:
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Week 5
Leaves. Color - Yellow
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Hashy
Hashyanswered grow question 4y ago
Looks like magnesium to me.
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HerbalEdu
HerbalEduanswered grow question 4y ago
Yup, it does looks like first sgin of magnesium deficiency. https://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg
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Organoman
Organomananswered grow question 4y ago
Yep, I agree, magnesium deficiency. Top dressing your pots with a small handful of souble magnesium sulphate powder should cure this. Generally available from any good garden centre. Just water it in after application, simple.
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