Paging dr greenthumb!
I have recently noticed black spots on some of my Hell's OG leaf tips. I am feeding, a combination of Biobizz, calmag, molasses and Ph 6.0. Originally I though it was a phosphorus deficiency, but the Biobizz should be sufficient enough. Then I thought it could be calcium, but the problem persisted when I started adding calmag.
My soil is organic living earth soil blend.
Any idea what this could be? Your help will be dearly appreciated!!
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