Now they are getting too close to the hps lamp, which I have raised about as high as I can:

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I have installed a plastic net in order to try some kind of scrog. Maybe it is a little bit to late to start thinking about scrog this far into the flowering stage. But there isn't much more space for the plants to grow in now.

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It looks like the flowering process is continuing as it should as far as I can see.

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This leaf is close to the pot. There are a few more leaves down there that look like this. Most other leaves looks fine. I have given the plants nutrients at a much lower level than the recommendation on the nutrient bottle. Since the plants grow steadily and fast, I don't see any reason to increase the nutrients. But maybe I should consider lowering the nutrient level, or maybe simply stop giving the plant nutrients?