complete yellowing "VEGGING" outdoor grow in pots, bucket soil, hot afternoons

first time poster, any help is greatly appreciated, great site, have learned a lot from here, but can not find on the site what is wrong with these guys, at least not in my situation. MY PLANTS ARE COMPLETELY YELLOWING, EVEN YELLOWING OF ENTIRE PLANT, NOT THE TOPS, NOT THE BOTTOMS, not tips, and NOT SINGLE LEAVES, BUT THE COMPLETE PLANT IS YELLOWING. these guys are about a month or so from rooted clones, i am in northern california, very hot days, these plants are in pots and buckets, they are in either happy frog soil or fox farm ocean forest. i water them once a day with tap water that i usually leave sitting for a day, sometimes twice, about a gallon at a time, i usually water in the mornings and they dry out by night. i water with about half the dose of general hydroponics floranova gro every other day or three times a week. only my largest plants are turning green, could it be they need more nutes because they have depleted the nutes that were in the soil from the start? i've had this same thing happen to some gdp plants i had going earlier this year, i was feeding them piss, fish pond water, and miracle grow all purpose soluble nutes, and filled/lined the bottom half of my pots with cheap miracle grow garden soil that smelled very piney, the roots got to that point and would not grow down any further. my plants turned yellow, i threw them into the ground, fed them floranova gro and and they bounced back and are beautiful, currently two weeks into flowering and beautiful.

the yellowing plant is on the right, they are both blue dream plants and are about 3 to 4 feet tall, the one on the right, that is yellowing is in a five gallon bucket, and has been in it for about a month, the greener plant on the left, is in a 4 gallon flower pot, and has been recently repotted after outgrowing the 2 gallon pot it was initially in. the plant on the right was a lot bigger, but i guess growing has slowed down due to the "deficiency". i have also recently super topped them, topping every single branch, hahaha. if i missed any important information, anything, let me know. here is another picture.

how do i still have vegging outdoor plants in the middle of august you ask? i am supplementing them with light at about 3 am in the morning. really cant tell in the pictures, but take my word for it, the plant on the right is light green to yellow, and has slowed or stopped growing.

here is some eye candy. plant closests is a revegged bubbakush, and the two behind it are gdp, pics are from about a week ago.

Ph? If not locked up or rootbound..maybe iron or nitrogen. Just a wag since you say the others are fine.

It could possibly be ph, but if it was, id assume the rest of them would be yellowing as well, i just havent bought into ph much, i clone with tap water, and water my garden with tap water, floranova is suppose to adjust ph as well. Root bound is definitely a possibility, i know these guys for sure have outgrown these buckets and pots, would rootbound truely cause the plants to yellow? I flushed a plant yesterday, i have about 6 plants, all blue dream, all in either pots or buckets, two of them have not turned light colored yet, but the rest have, i have a huge lush kandy kush plant that has started yellowing as well, ill take more pics in the morning, these are my largest plants that have been affected, my smaller bubbakush and gdp plants seem unaffected, i guess ill feed them again at full strength tomorrow morning, if no change, ill probably flush them all, give it a day or two and then start feeding again. Anyone else want to chime in? The leaves arent drooping at all.

Not sure if my eyes are playing tricks on me, or getting my hopes up, but since ive upped the nutes, they seem to be becomg green again, i popped one out the bucket earlier, it was sitting down low in the bucket, so i popped it out, added about a gallon of fresh soil and popped it back it, roots had completely filled the pot, wrapping and rewrapping, a lot of hard careful work, removing a plant thats nearly 4 feet tall with about 4 gallons of dirt, then adding soil to the pot and tossing the plant back in the same pot u just pulled it out of.

Quick update, noticed the yellowing continuing, i went on ahead, dug a nice big hole for it, popped it out, and sure enough, roots had nowhere to go, completely wrapped up in the bucket, threw it in the hole, that takes care of my other yellowing plant, hope no more yellowing of the remainders for at least another two weeks. My plan is to harvest my inground plants in about a few weeks to a month, and then toss these girls in those holes.