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I need to know the full rundown of your environment including temp and humidity as well as any other useful info you can provide. As of right now it looks to be a mixture of over watering and heat stress mixed with poor airflow.

Well holy s#@t bro you most definitely have signs of a viral infection. I have been researching something called TMV (tobacco mosaic virus) which this shares some or the odder symptoms of but i would not go down that road until you test for it (which gets expensive) if you have other plants to...

Has it rained or been abnormally humid as of late? That is almost 100% botrytis (gray or black mold) the infected parts should be removed and all tools should be dipped in 90% rubbing alcohol.

Lets not start bashing on products that have been proven effective if used properly, I would say that first we need to know exactly how warm the solution was. Also as a rule of thumb don't ever use the full dilution that is printed on the package when spraying cannabis because it will almost...

and that is 5ml per gallon for the cal mag.

100% cal mag deficiency and actually a textbook example! I would supplement your water with 5ml of liquid cal mag, just make sure that the product you use does not havenitrogen.

Actually after looking for a bit longer my professional guess is it is some sort of epidermal fungus. Try spraying with Serenade.

Those can be Scales (a small hard shelled insect) or it could be caused by high humidity or possibly a fungus. Whatever it is i would say that it is very rare indoors and i would not switch the photoperiod until is has cleared up.

I always recommend General Organics cal-mag+ use it at 5ml a gallon or roughly 10 large drops.

The first pic looks to be female whilst the second looks to be a male. herm?

Organic cannabis is 50X better than chem as far as taste aroma and potency. I find it funny that people strongly believe that cannabis these days is "stronger" then what was around in the early 60's but the truth is that is COMPLETELY not true reason being is cannabis grows to its full potential...

Overfeeding 100%!! Flush with a very diluted nutrient solution.

Just some mechanical damage. No worries.

That is more than likely a PH problem! Check your runoff ph and ec/ppm and make sure it is in the 6.4-6.6

What you are seeing is basic light burn from the switch from low light to heavy LED lighting, that for sure can cause burning. I would feed something high in (K) to help relieve the stress and move your lights about a foot further from your canopy.

Almost 100% a male! Take it out of your grow before switching to flower unless you want seed stock.

This occurs from a mixture of plant genetics and sometimes environmental conditions.

"Ditch weed" as it is called is what is leftover from the old hemp crops of the US and they grew where you found them because of bird distribution, THC content is nil.

If you are not using ca-mg with your distilled water you should start because there is none in distilled and calcium is important to buffer your nutes so that the ph does not swing as intensely. Use a ppm pen and cal mag to bring your distilled water or RO water to around 140ppm and then add...

What method are you using? hydro, hydro organic, soil organic or chem soil?