Help! yellowing on veins

[happily]

I suspect your problems all stem from using Miracle Grow soil and nutrients as neither is made for growing MJ. The soil contain slow release nutrients which can create problems for autos. It is often too strong, and since it's slow release, last too long. I would strongly suggest getting some better soil and nutes for your next grow.

Regarding the yellowing, from your pictures it looks like it was only on the top leaves. Usually when the yellowing is only on the top leaves, and it starts from the center of the leaf and works outward, it's light bleaching. Did it start after you added the LED? If so, how close to the plant tops do you have it?

Thanks Muddy I've ordered some fox farms. It did start when I added the led and moved them to a closet. It is all young growth that's yellow from top to bottom of plants but leaves green up as the fan leaves get bigger. it does start from base of the leaf and works outward. sulfur is my best guess. I bought some fresh epsom (other was about a year old)I have carpet under the trays for space, temp 70-80, fresh air is something else that's lacking. lights 6-30 inches from tops same effect

 

[happily]

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[happily]

FWIW
Too much company around lately and Lack of fresh air was a significant source of my problem. I added a remote thermometer to keep a better eye on temps when I can't get to them plus I added co2 and things are looking up