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    Two Weeks into Flowering - Just a Few Concerns

    Today was the 15th day of flowering for my grow, which is 5 plants under two 150 watt HPS bulbs and four 4' T5 florescents. This is a picture of my setup. I have the tubes angled on the side to help get light to the lower branches, since the plants are bigger than I anticipated and the small HPS...
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    Bottom leaves yellowing on 4 week old plants

    I took more pictures of the plants today, a few new leaves are brown on the tips, but for the most part whatever it was seems to have stopped spreading. Plus, the plants have grown about two inches in the last3 days. :) They're about 14" now; in a few days I'll probably top them, make clones...
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    4 weeks old, bottom leaves yellowing on tips and edges

    No, problem; does it still look like a K shortage?
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    4 weeks old, bottom leaves yellowing on tips and edges

    I know they're not attached normally, but there were kind of a lot.
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    4 weeks old, bottom leaves yellowing on tips and edges

    I guess I'll give this one bump. I know I'm long winded, but I'd really appreciate whatever input you have. :D
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    Self Diagnose Your Plants

    Wow, why isn't this stickied?
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    4 weeks old, bottom leaves yellowing on tips and edges

    Background I have five AK-48 plants that were sprouted about 4 weeks ago. They started under four 4' 40w fluorescent tubes. When it was evident that the plants were stretching badly (the sprouts were falling over) I added two additional 150w HPS bulbs and a small fan. This seemed to solve...
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    Bottom leaves yellowing on 4 week old plants

    A short update: The bottom-most leaves seem to have yellowed slightly more and I read that Nitrogen availability starts to go down at a PH of 8, so I'm wondering if the PH could have been causing what I thought was a N deficiency. I used bromothymol blue to test the PH of my tap water and it...
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    Bottom leaves yellowing on 4 week old plants

    Cool, thanks again. I'll just chill for now and keep a close eye on it, maybe grab a PH tester since I should probably have one anyway. Edit: Looks like you were probably right about the soil causing the burn. Edit2: That's a beautiful bud! Right now all five of my plants are growing nearly...
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    Bottom leaves yellowing on 4 week old plants

    Hey and thanks for the response. The only reason I didn't consider nute burn was because when this showed up I had yet to fertilize the plant. You think what's in the Miracle-Gro soil would be enough to burn it? I know it's not much damage, but I was trying to be proactive about it. It is my...
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    Bottom leaves yellowing on 4 week old plants

    OK, so these AK-48 plants where sprouted almost 4 weeks ago. There are five plants, which I started under four 4' 40w fluorescent tubes. When it was evident that the plants were stretching badly (growing 4" in a day and falling over), I added two additional 150w HPS bulbs and a small fan...
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