Please Help Plants are dying ! I Am Desperate

OK, let me start by saying I've read through all sticky's and am still unable to ID the problem I'm experiencing ! I have had several sucsessfull grows & have never had this problem. I am using Pro-mix BX and using water that's pH is 6.4. I am feeding with advanced nutrients Sensi 2 part. Any nutrients added were at half strength in hopes it would cure the deficiency ( didn't work stopped feeding after that) . The plants have been thoroughly checked for bugs and none seem to be present ! I have seedlings as well as a few bigger ones and all seem to be suffering except the clone that is marked " Good 1 " in the pics that i got from a buddy. I have tried to re-pot the plants in new soil and just give pH adjusted water and still no luck. If anyone could help i would be very grateful thanks Suspect

If they have a deficiency then knocking back the nutes was the wrong thing to do, also.. what pictures?

Yes i know but promix is a soil less mixture and if there is a deficiency nutes at quarter strength may add what is needed to the soil . Plus this was happening before the nutes !

Well, it look's like nute burn / nitrogen deficiency.

Flush the pots, also you shouldn't have re-potted them since they are already stressed, thats adding salt to the wound.

I have already flushed the with pH adjusted water 6.4 still nothing its been 4 days now any other thoughts

tri something with macro nutrients of some guanno as a ground cover

What lights are you using? how close are they? did this start happening before you used any nutrients?

They could be lacking magnesium but your pic has a little motion blur and i cant diagnose it properly when its that blurry.

I am using a cool 400w MH not a very hot light but its warm they are definatley not burning or anything . And yes the seedlings sprouted and grew a little and then started turning yellow without nutes. Also i have 2 seedlings from another buddy and they are starting to be affected as well.I have sprouted many seeds many times and grew out in promix without problems . Now this is happening im very confused

man to me it looks like you could be over watering....along with a lack of Nitrogen...
Only the tiny one is looking haggard... your other bigger one not the good 1 but the other, is lacking a little bit of N but it doesnt look like its too bad....

Peace

slow down on the watering and if u guys would just get some big bloom and water prop,I trans plant and then give big bloom and and my plant love it they seem to go through grow spurt after every feeding even right after trans plant,It is made from the best bat guano and earth worm casting fox farms can get!!The shit just rocks and at flr i add tiger bloom in the mix and boy i do not have any of these probs ever,before fox farm i used bg and ewc and would mix into my outdoor soil,i now grow indoors and fox farm put it in a bottle for me just for me,kidding!!hahaha!!

you say theyre comin outta the ground and yellowing? is your soil burning them up? whats the numbers on your soil? looks like stress to me. something in your enviroment is off kilter...

Ok all pots with suffering plants have been dried out and then re-watered serveral times I don't believe overwatering is the issue. Also I am using advanced nutrients which contains Nitrogen (feed all plants once at quater strength hoping to cure the deficiency ) Anyone else ???

KidCreole said:

you say theyre comin outta the ground and yellowing? is your soil burning them up? whats the numbers on your soil? looks like stress to me. something in your enviroment is off kilter...

Click to expand...

Promix is soil less it contains no nutrients and means theres no numbers !

Are all your plants clones? or are some actually from seed?

Also, i would say for the bigger plant thats effected why are you only giving it 1/4th nutes?

got any little plant suckers in the media(scarid e.t.c.)??

whereami said:

got any little plant suckers in the media(scarid e.t.c.)??

Click to expand...

He said he already checked for bugs.

Ryando said:

Are all your plants clones? or are some actually from seed?

Also, i would say for the bigger plant thats effected why are you only giving it 1/4th nutes?

Click to expand...

Some Clones some seed.
As for the bigger one i gave a medium strength feed. This is really starting to get to me i am in the process of drying out the soil. Thanks for the input as well keep it coming !

well problem solved . here is what i found since i was using a pvc grow tent which i did not mention because i didnt no that was a factor! Stay well clear of any tent with white interior made of PVC. THEY WILL KILL YOUR PLANTS! The symptoms mimmic (sp?) nutrient defficencies, lockout and ph problems and usually end up killing your plants over a couple of weeks from the bottom up. Plant growth will slow, then stop and roots will die, bizarre chlorosis will occour, stems will be weak and thin, leaves will curl over and under, burn and drop. Whole plants have turned completely bright yellow overnight in extreme cases.

Apparently the tents made in China (lots about on a popular auction website) produce toxic fumes when exposed to heat and light, causing the stomata to close, quickly killing your beloved. I have a link to another site here. You MUST read this.
Grow Tent OutGassing / Offgassing WARNING!! - International Cannagraphic Magazine Forums
Or google "grow tent outgassing"

Thanks everyone for your input

We got a batch of those tents at the growshop i work at about a year ago... alot of clients came back 3-6 months ago complaining... we had no idea these were copies made in china! We exchanged the bad tents with new ones.... and these were no more problems
I feel for you man... 3 months wasted.. Did you get yourself a new tent?... If not, go for mylar! they are much more efficient!

yes i got a new tent with silver lining hope everything goes back to normal quickly. I lost a lot of good strains to that piece of sh*t but all is good now and am very pleased with the new setup