yellow leaves dying off at week 5 12/12 help please

[YwouldntI]

wattup ic fam,im YwouldntI.i been growing for a few years and have never had this problem before.my leaves are yellowing up and dying off too early im just getting in to week 5 of flower.i ph water and after adding nutes and my runoff is at 6.8 it starts slow then bam banana yellow.i have no idea what this is but im sure its bringing down my yield.ive include a pic of the main stages of the leaf yellowing up.and a couple of the grow.thanks fam.-Y

SOIL:

How long has this problem been going on? the last three harvests
What STRAIN are you growing? black domina,blueberry
What was the establishing technique? (seed or clone?) clone
What is the age of your plants? week 5 flower vegged for 2 months
How Tall are the plants? 3 1/2-4 ft
What PHASE (seedling, vegetative or flower) are the plants in? flower
What Technique are you using? (SOG, SCROG etc) perpetual grow i guess sog

What size pots are you using? (Include how many subjects to pot) 5 gallon buckets 1 per bucket

What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) im using pro-mix mixed with baccto at a 70-30 mixture 70%baccto nothing else added to medium

What Nutrient's are you using?How much of each with how much water? How Often? *Knowing the brand is very helpful* i use ff nutes,grow big in veg,and big bloom and tiger bloom in flower also this run im using the open sesame,chaching,and beasty. i use the ff stuff at 1/2 to 3/4 of recomended dose.i also use SWEET the first four weeks of flower at recomended dose.super thrive 7 drops per gallon once a week.ph up and down as needed.i know im foegetting somethin hmmm.oh cal-mag every watering as directed.im prolly still forgetting somethin'

What is the TDS/EC/PPM of your nutrients used? dont have a ppm tester
What is the pH of the "RUN-OFF"? 6.8
What method of pH test was administered? Using Strips? pH pen? pen
How often are you watering? as needed when buckets are light to lift or when certain plants are showing me they need water usualy every two to three days i feed once water twice and so on...

When was your last feeding and how often are you feeding? last feeding was friday march 4th

What size bulb are you using? i have five 1000 watt lamps in flower
What is the distance to the canopy? canopy is about 1 to 2 feet from canopy under the lamp on my mover i put the taller ones its about a foot away

What is your RH Factor? (Relative Humidity)What is the canopy temperature? it varys from 89-94 lights on workin on a bigger a/c now humidity in room is 40 % i believe
What is the Day/Night Temp? (Include fluctuation range) lights off its around 68-70 lights on between 89-94 F

What is the current Air Flow? (cfm etc.) i have a 6 inch ecoplus fan on the matching filter i believe cfm on fan is 440 also a circulating fan and a box fan in the room

Is the fan blowing directly at plants? no
Is the grow substrate constantly wet or moist? no
Is your water HARD or SOFT? not hard water
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? tap water
Has plant been recently pruned, cloned or pinched? no
Have any pest chemicals been used? If so what and when? no only no pest strips ive used smc to keep a step ahead of any bug issues but only in veg

Are plant's infected with pest's? not infected, ive seen thrips although i dont believe them to be the cause,they are a new adventure a short lived one im hoping,i have no pest strips down now and 4500 ladybugs to arrive on the 9th.they will eat the thrips and any other freeloaders i have trying to mess with my ladies

heres the main stages of the leaf discoloration





heres a couple garden shots the hps is makin it more yellow then it is.i'll get a few lights off shots up tomorrow





a group shot of the next 15 to come out on 5/3



veg stays nice and green





and here is a lights off shot from last week on the left you can kinda see what im dealing with,and on the right you can see how the new plants coming into flower are nice and green when they come in


and another shot of the green plants about 2 weeks into flower as of today.


thanx in advance fam for any and all help with this situation.ive searched the forums and cant find the problem ive been battling this for a good lil minute now and need the knowledge of the ic community to get this fixed.you guys are the bizomb.peace-Y-

 

[GET MO]

This happenned to me on my last grow, like 5-6 weeks in leaves yellow and then plant growth stops as all the leaves dry or fall off. I think it might have been a nut loc out or from salt build up, so Id flush and thin I think I overwaterred cuz the roots could not absorb with so little leaves, so they ended up gettin root rot. Probly need to flush with a real week nut solution, and maybe some calmag. sounds like your also using way to much superthrive, the more I read about this stuff the less I like it, Even so if u do use it just use a drop a gallon, and probly less than once a week. Hope this helps.

 

[Ploum]

May be a nut lockout issue, may be a simple N deficiency, may also be root bound.
Do the roots have enough place to let the plant finish their flowering ? When did you stop to bring them some grow nutes ? At the 12/12 switch, after they stretched... ?

Good luck.

 

[YwouldntI]

i gave them grow nutes the 1st two weeks 12/12 at half dose,then switched to tiger bloom,yes there is room for roots in 5 gallonbuckets.

 

[stinkyattic]

The pic you show of the younger plants in their new homes- your soil level is VERY low in the buckets. Not only are you only using about 3 of the 5 available gallons in each pail, but air flow around the base of the stem is not ideal. If your plants are over 3 feet tall with multiple tops (which is the case, correct?) the soil volume is insufficient, even if actual pot size would have allowed you ample room had you filled each pail completely.

 

[DIGITALHIPPY]

not enough nitrogen pre-veg, this is normal. quit picking off the non-yellow leafs.

 

[YwouldntI]

digital i think you hit the nail on the head man.i believe im not giving enough n in veg bro as soon as i read it,it was like DING! i know i go light on them in veg not wanting to over do it.and i dont normaly take the non yellow leaves off,i just neededa pic for you guys and my lights were on in there making everything look WAY yellow.thanx bro
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stinkyattic ty bro ur probably right on too,on those new ones my ass put a less amount purposely thinkin that when the plants fill up 70% of the container they would get a big spurt like in veg.still waiting for the results as now its a lil late to change my mind.im glad you shared all that knowledge with me though,cause i always heard that air circulation was good for around the stem.i thoughtthat was one of the reasons we trim the popcorn stuff off.to increase weight and get some air circulation around there.
but i guess you mean that i've got too lil dirt regardless and that will fix it eh?peace