Yeah, but also sulfur and stump removerVerite said:If hes using tap water hes getting plenty of calcium and magnesium. I would also avoid doing any boron suppliments, wasnt that sproutcos mode de morte?
Anyways, I've been seeing a little of this in my garden as well, but the "problems" were so minor that I never really paid much attention to it. I looked for bugs, but couldn't find any, and thought maybe it was an isolated incident of one bug that snuck in somehow.
But it seems some of my plants are showing other signs of calcium deficiency, so it makes sense that I need more calcium. Although I haven't paid much attention to the "holes", I have noticed that other calcium def. symptoms have seemed to go away after upping the Cal-Mag+, although I'm not 100% convinced yet.
By the way, I'm running Canna Coco A+B with low-TDS tap water (~40ppm @ .5).