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Calcium deficiency?
Dude147started grow question 3 months ago
Hello everyone,
I need your help once again.
I have just spotted some brown/yellow dots on 2 leaves of my plant.
Did some research and looks like Calcium deficiency, but still wanted to ask you.
If that's a Ca deficiency, should I add CalMag next time I feed her?
Thank you ✊
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Incognitusanswered grow question 3 months ago
looks a bit lush so something impacting availability of Ca is a possibility too. Also, make sure pH has not drifted too low, as Ca will be one of the first issues seen.
the plant needs Ca at all times. so it won't be a 1-time addition to fertilization.. you'd need it each time. With soil, you could amend a bit more garden lime and maybe that eliminates need for something like calmag in addition to your normal nutes, but if it is necessary now, it'll be necessary until the end of the grow. if in soilless/hydro, this is much easier. I assuming your are somewhere around 1.3-1.6 EC (mix of nutes, not including tap water ppm) and 100ppm or more of that should be Ca. YMMV due to various local variables including your tap water. Good ballpark to start, though.
Wobbleysausageanswered grow question 3 months ago
Tbh those dots are nothing to worry about. If they spread, then start worrying. I didn't look at your diary so I don't know what your medium is or anything but your approaching nitrogen toxicity and fast. The leaf is very dark green and waxy. I feed calmag pretty much all through mid veg and flower unless I feel I'm over saturating the medium.
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AutoflowersSucKanswered grow question 3 months ago
Calcium is in less demand in flowering, but it still needs a little, as well as nitrogen. That leaf looks especially dark green which indicates a ton of nitrogen. Calcium can not get up to the top of the plant without nitrogen, as it is chelated to the nitrogen molecule. Without Nitrogen, you'll get no calcium uptake at all. Calcium is also most available at a pH of 6.2, and it's availability will tapper off significantly beyond 6.4 pH, as well as Phosphorous and Potassium.
If you are growing in coco ( i don't know if you are) you should be applying callmag with every watering, not just feed days.
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