whats are my plants deficient in?

ok so about a week and a half ago my plants started to yellow from the bottom up. leaf veins are left light green or yellow, and leaves are not dropping off. they are just yellowing up and wilting down and thats it. i thought it was the plant naturally moving nutrients toward the upper portion of the plant as they do at harvest time. but the problem is i will be at 42 days (6) weeks on thurs the 23rd. so my thoughts are that i am lacking some sort of nute. first thought was N since that is a main part of they food. so i added some Grow nutes trying to get some N back in. a week later and we are still yellowing. i have lost over half of my leaves, now all that is left are most of the leave around the actual buds. before i go on and mess thing up more i would like some input from all you that have dealt with these issues. my second guess would be a P or K deficiency. pls help i dont have much time left


soil
general organics
bio-grow, bio bloom, kool bloom liquid, floranectar, florablend.
sour d x2 (most severely affected, this picture is a sour and my second fav.)
mystery plant x1
3 gal pots

hmmm hows the ph? have you introduce anything different within the past week?

no ph meter, third grow though, always been fine without one, slowely gathering my arsenal though. and no i haven't added anything new. i did however, after the yellowing began to worry me add my VEG nutes at half strength (4-3-3 2 tsp per gal) to try and pull her around. but had no visible changes yet, first hit em with it on the 16th. and only water the week prior. i did however pull em from veg nutes to soon. went to half n half veg/bloom a week after flip. full bloom at two weeks( first pistils)

here is the amount of leaves that have gone in the last week and a half. something is up. this has never happend to me.

could it be a Sulfer thing? only my flora nectar has any that i see, and its only 0.5%

some one in here has to know something?

Yellowing is usually a lack of nitrogen. Nitrogen can be deficient because you haven't fed it enough nitrogen or it is being locked out. Ph has to be pretty far out of whack to lock out nitrogen so doubt that is the issue. The only other thing that I know that locks out nitrogen is excess potassium.

Diagnosing stuff like this is easy if you know all your ph levels and ppm of feedings.

shes outgrown her pot, is tired and going into early fade, the 3 gallon pot looks like its got 2 gallons of soil only and she has exhausted the N reserves in the soil so is now living off leaves, u prob pushed her hard with the lights too...no prob if the soil is nuted....this will not correct but you can suffer little loss if ya keep her healthy....top dress and fill that pot plain water till u see the reaction after 3 days...peace z

you know i had thought of that at the beginning and havent thought of it again. they have been in those pots since beginning of feb. i have fed them with every watering for life of plant. i got to thinking about it and decided i needed to cut back on feeding. then this started. can i hit em a 10-54-10 solution? and give her a good flushing?

where can i find a good thread on top dressing

No you cant do much now, the yellowing is the result of long term salt build up from the nutes. Also it looks like you recently transplanted with the droop.

That's magnesium bro.

Wow,,,you would think someone would know this one by now.....NOT a N problem!!!

It's a P&K issue!!! The P&K your adding is too high and you did it to early in flower....At this stage of the game you can only keep going.....They will finish out OK!!!!!!!

DO NOT add any screamingly high P chem at this point or it will REALLY go yellow on you much faster!

I run veg nutrient right up to the end of week 3 in bloom and don't flip to a Flowering nutrient till the begining of week 4. I won't "kick" or "spike" the P&K till week 6 and then only once......

Simply run it out and drop the high P additive....

you'll do fine!

would a good flush help anything right now? i was really hoping for a N problem. played with it once or twice. was worried about P being the problem. no pleasantries with that one yet. so just let the P drop? when could/should give more? its the koolbloom by G.O.(first time using it. more potent than i thought.) added early messed it all up, thats ok i can fix er next time i guess. i just want these to make it to harvest. best crop i've had so far.

DreadsNropeS said:

would a good flush help anything right now? i was really hoping for a N problem. played with it once or twice. was worried about P being the problem. no pleasantries with that one yet. so just let the P drop? when could/should give more? its the koolbloom by G.O.(first time using it. more potent than i thought.) added early messed it all up, thats ok i can fix er next time i guess. i just want these to make it to harvest. best crop i've had so far.

Click to expand...

If it's the DRY Kbloom,,,oh hell yeah that was it!
If it was the liquid, it did it too!

I might hit the girls with the dry at 6 weeks ONCE.
About the same for the liquid....

Right now just don't use any more.....They will finish out fine..

Simply use water for the next cpl of waterings if you want to.

Please don't flush soil.....that can lead to more important problems!

thanks DOC, i really hope these little ladies will hold out for 5-6 more weeks. not really sure on bloom time, i was given the seeds and told they were sour D. but who knows for sure. with this problem i have now would it just be best to do a flushing 2-3 days before harvest, and let em dry off a little before cutting down? just to keep what i do have for nutes as long as possible.





also with the Koolbloom, next time, add it at 6 weeks after flip? use bottle directions or lighter dosing? and should it be just a one time feeding or 2-4 times throughout flower