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One of the issues, the white patches on the leaves looks like powdery mildew. I don't know what the black dots are.

Good luck this year! What is your opinion on selecting PM resistant strains?

The one who is going 100 KPH. ;)

Some new pics with pics of the whole plant might help.

I can't tell. With fusarium wilt the healthy green leaves and stems will all fall over and will be green for a short time before the plant eventually dies. If you only experienced it on a few branches and the plant survived to harvest it's something else. Not sure if that is what he has, if it...

Looks like fusarium wilt.

What type of lights are you using and how far are they kept from the canopy?

Looks like a bug issue. Not sure which one from the pics but likely thrips, spider mites or russet or broad mites.

It will continue to grow larger for about 4 weeks on a typical 8 - 9-week flowering strain then go into full flower when the stretch ends.

There are a number of growers that have high levels of iron in their well water and have problems using it. You should get it tested to see what's in it and post the results.

I guess everybody has different tolerances to smell. I am never bothered by the scent of neem oil yet many feel it smells terrible. Fish emulsion is the nuts if you need to throw up. Just open a bottle and take a deep sniff. I always mix that outside before using it. Three of my favorite blends...

If you are growing indoors consider trying a small bag 1st. It's great outdoors but indoors I tried it and found the smell offensive compared to other blends. It's probably the feather meal and the manure.

I don't use liquid fertilizers. I use top dressings of dry fertilizers that take time to feed the soil. I prefer something like 1 - 1 1/2 tsp of fox farm marine cuisine 10-7-7 for a solo cup. Liquid nutes work faster. If it was me and the seedling was healthy and dark green I'd probably wait for...

It has very little food compared to ocean forest and if left in a solo cup it would need to be fed after 5-7 days. When I used it to germinate, I preferred to pot up with something like ocean forest after 7 days from sprout to a 1-gal pot instead of feeding.

Not sure what it is, considered powdery mildew but looking at the locations of some of it I'm fading towards sap.

White specs might be bug damage, possibly spider mites.

Looks like one of the issues is a magnesium deficiency on the yellow one. An Epsom salt foliar would quickly determine if it is a mg issue. If it's mg the color would improve within a few days after a foliar.

Light Schedule: 20/4 Light Intensity 25% - sprout to seedling 40% - seedling to veg 50% - veg to preflower 75% - preflower to mid-flower 85% - mid-flower (now) I don't grow autos but if they are the same as photoperiod with their demands then the light intensity should not be raised in late...

It's difficult to have a serious conversation on this topic because of all the parrots posting. In real life every time there is a competition in the winter there are a % of LED growers always complaining about small plants and blaming the temps. Never hear the hps growers complain about temps...

I'm not a coco grower so I'll let the others help going forward. You should start by comparing the ppm's of the water going in and the ppm's of the runoff and posting the results to see if there is a salt buildup in the medium.