Have I got a problem here? (a little help on a soil grow, por favor?)

I'm seeing some potential trouble spots, neighbors, and...being a first timer...would appreciate your feedback on whether the occasional leaf imperfection is normal or whether I better jump on this. 25 days since germination, Roots Organic Original soil. Following nutes: R-O buddha grow, trinity and ancient amber. (Actually left the trinity out by mistake last feeding). Veg room peaks at 88-90F and RH runs pretty consistently about 40. Low temps run about 70-79F, depending on night.Water has been distilled, but seguing into filtered tap water which I then leave "open" to the air for 24 hours. 2-3 days ago began misting plants with (2) TSP H202 per quart of distilled water (3% before dilution). The 2 plant issues started BEFORE this. Issues: 3 plants show some dry, brown papery spots on low to mid level leaves. 1 plant is lagging the others in growth, is paler green (not the lush green of the others) and has purple leave stems and purple stripes on the primary stem. Not sure how accurate my soil ph meter is but it says the soil ph is about 6.8. I have never flushed these plants. They're on 18/6, (4) 4' T8's and (2) 4' T12's. I JUST raised the lights last night as they'd grown (they average about 5" now) and they were up to about 4" from the lights. Since last nights change they're about 8" from the lights.

I have a couple plants that have some small "pin head" spots of paler green. Not many. I almost daily pick up at least a sampling of the pots (1.05 pint) and check out under the leaves carefully, looking for any bugs. I generally fun any possibly problematic leaves between my fingers too, to see if I feel anything out of whack and to "scrape off" any bugs that might be there. With the possible exception of the handful of pin head spots, zero indication of mites or any other insects. I do make it a habit of showering and / or changing clothing before visiting my garden after I've been outside.

I'm grateful for any help y'all might send my way. THANK YOU!

...and I did spray everybody with Doctor Doom last night just in case the pin spots are from mites. (I know they're small....they are at least visible to the naked eye right? If I'm looking carefully?). Paid special attention to under the leaves but per instructions on can didn't hose them down to the point where there's visible liquid dropping from the plants, etc.

I wouldn't worry about mites at this early stage, the yellow leaves look more to me like nitrogen deficiency, but the spotting looks like the leaves have been burned somehow. Never mist your leaves with nutrients only pure water or it can cause burn spots like what you are seeing. They look healthy for the most part my only advice is to transplant them in bigger ports.

You just need to bring the n-p-k up a bit and give them some cal-mag. If you pH is straight then the burn on your bottom leaf is a calcium deficiency. Other than that they look happy

And it would really help if you could keep your temp bellow 80

majek said:

I wouldn't worry about mites at this early stage, the yellow leaves look more to me like nitrogen deficiency, but the spotting looks like the leaves have been burned somehow. Never mist your leaves with nutrients only pure water or it can cause burn spots like what you are seeing. They look healthy for the most part my only advice is to transplant them in bigger ports.

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Always keep a look out thought for mites.But It don't look like it.

I never mist no more.I just keep them green, and growing fast, and working on going bud free.

boarderofsnow said:

You just need to bring the n-p-k up a bit and give them some cal-mag. If you pH is straight then the burn on your bottom leaf is a calcium deficiency. Other than that they look happy

And it would really help if you could keep your temp bellow 80

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I would up the nutes too?

What soil you use?

bigger pots*** but yeah, more nitrogen should solve your problem.

Thanks TONS. Nothing like a little expert advice.

Its NEVER this hot in MI, let alone for 3 weeks straight. Its gonna be worse in the flower room. I think I've got it pretty well vented and will clear the room air regularly, but if it's 90+ outside (100F today!) what do ya do beside a/c? And then I'm venting my conditioned air outside! (scratches head).