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Is this a cal-mag deficiency?

densesensistarted grow question 5y ago

My autoflower is in coco. I've been nute feeding at 500ppm and also foliar spraying a calmag 500ppm solution at nights off. It seems to be a calcium def from what I see on PWE. I plan on flushing tomorrow at 6.0ph with florakleen and then feed next day at 550ppm.

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Leaves. Color - Dark-brown

Leaves. Color - Black or grey

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Robertsanswered grow question 5y ago

Yes cal mag spots. Coco absorbs calmag so have to add extra to compensate. It's one of few cons for using coco. Beside that it's a great substrate. Good luck and happy growing 🌲🌲🌲👊

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