Answers about what specifically?
They look perfectly fine albeit slow and stuck with an impatient obsessive grower.
It may just be me, but i only found ~1/10 of the proper info for diagnosing the problem, and I shouldn't have to "hunt" for info anyways.
If you're being an impatient newb and are wondering why your plants are being slow, I can answer that quickly.
Its likely they need a lot more light intensity. Autos should grow abnormally quick, and at 28 days an auto should be 5-8 nodes further. Are they outside in 8-15 hrs DIRECT sunlight? Or inside? If so, what actual wattage and type light have they been under and how far away are the lights? What is the spectrum? Have you been allowing the soil to dry fully, then fully soaking it on watering days? Are you controlling the climate in the grow area? Elevation is not as important, but rh, air-temp, root-zone temp and moisture, light period, and amount of fresh airflow should all be within the cannabis's optimal ranges. Proper pH is 100% required. And if you don't know those, (I assume not because you didn't know what "Hot" soil was), LOOK IT UP. Heres a
link to where all answers are indexed,
www.google.com. Works a million times better than asking ask.com.
If everything checks out, and if its still speed you are worried about, consider other environmental factors such as CO2 levels and check for possible root pests.
If you are obsessing about the nearly invisible spots you claim to be seeing, there could be a number of things that leave "spots" such as excess calcium in the water you sprayed. It could be nute residue, could be a nute deficiency. It could be spider mites, could be thrips. It could be hot soil. But the "spots" that no one else seems to be able to see are more than likely, NOTHING. If you think it has anything to do with the foliar feed, I advise you to wait 1-2 more weeks before foliar feeding as seedlings get 90% of what they need in the first 2-4 weeks from the cotyledons and the soil.
If that leaves you unsatisfied, oh well, get better pics and info.
Just like everyone else, from the little info I have it sounds like the best thing to do would(ve) be(en) possibly flushing, then leaving it alone and only feeding 1/8-1/2 strength nutes, teas etc. The flush is almost unnecessary though, and just seems like a stressor, which slows down growth.
But yeah man, most of what's right here was already told to you. Go do some THOROUGH (re-)reading, and see if you can't learn something from RIU's vast repository of knowledge. Like how teas, castings, and guano is a really poor feeding plan. Guano kills (and causes to go dormant) bennies. Those teas and castings are very ineffectual because you likely have too much P. If you go too overboard and lockout p, you'll get Iron and Zinc Deficiencies. And what do you do for the K during flower?... You sound like a total newbie who just doesn't listen to advice.
I'm out, thanks for giving me the opportunity to waste my time here.
No answers my ass,
KK