Lower new growth rot?

Hey guys, I have never seen this before and it is plaguing me on what it could be so I bring it to you guys to see if you can tell me or point me in the right direction on how to cure this problem. I am growing in roots organics and a mixture of roots organics super soil, I water once a week with worm castings and once a week with fish powder, kelp, fulvic acid, azomite, AGmino. This is a outside grow but I saw it on my last grow indoors also, and it usually starts during veg. I thought it was improper air flow but it is still doing it outdoors I have amended a lot of the roots organics soil into a super soil. Those plants don't seem affected at all but the plants that I have that are in pure roots organics and nothing else seem to portraying these attributes. I am growing in 65 gallon pots and I water everyday with 3 to 4 gallons each pot rather than larger amounts of water every couple of days. Conditions seem about perfect and I'm feeding him all Organix so I don't no what could be causing this, posted: are some pics the best I can get of the growth. Thx in advance guys

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And that new growth will slowly make its way up the plant unless i start choppin off those brances. The leave around the new yellowish/brown rot look seem rough and unhealthy

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im having similar issues did you ever find out any solutions?