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Thanks guys. I should have been more clear, all I did was up the N,K ppm. Using GH 1-2-3, at this point they should be at 3(Micro)-2(GRO)-1(BLOOM), and I tweaked to 4-2-1. Yes, they are still symmetrical. I was not aware that asymmetry was a sign of maturity, thank you for that, colourful. Both plants are at the 7th node, maybe 8th by this morning, so using your count, I have a ways to go yet. (If you count in the pic, add one node, as I trimmed off the bottom nodes because they were sitting on the medium, and I feared a mould may develop.) What I noticed last night, and forgot to mention,was the stem sizes. The shorter plant was the younger of the two, by about a day, and it had a thin, spindly stem comparatively speaking. Yet now, even though it is still the smaller plant, its stem is considerably larger in diameter than the other. Weird. Growing in 100% perlite, to me, is similar to growing in rockwool, or hydroton. It's just an inert medium. I found that it supports the plants better than the other two, drains better than rockwool, and holds more nutes than hydroton; probably due to more available surface area, but I'm guessing. Good growing all, stay green.