a couple weeks into flowering, why are my plants in coco yellowing?

hey guys im around 3 weeks into flowering, the flowers on her are looking nice and beautiful but there is a problem. On the bottom of her leaves, on both of my plants the leaves are starting to turn turn yellow and veiny and its starting to progress upwords. Heres a picture what do you think is going on?

whats up bomb.com.....u use a 150 correct? thats probably the problem.....the plant, due to lack of light, doesnt want to support those leaves anymore, i believe. however there could be more too it!

what is your PH going in
what is your PH going out
PPM going in
PPM going out

i had similar looking symptoms but in sunshine mix. ph was my problem

Looks like
- Nitrogen Deficiencies

Plants will exhibit lack of vigor, slow growth and will be weak and stunted. Quality and yield will be significantly reduced. Older leaves become yellow (chlorotic) from lack of chlorophyll. Deficient plants will exhibit uniform light green to yellow on older leaves, these leaves may die and drop. Leaf margins will not curled up noticeably. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf
surfaces may turn purple.

have a look here
http://www.amsterdammarijuanaseedba...eshootingsolutions/marijuana-plant-abuse.html

Hope it helps. Peace

i just noticed that i was feeding them the past 2 weeks with ph of 5.2, i just now bumped it up to 5.8-6.2.

PH IN SOLUTION: 5.8
PPM OF sOLUTIoN: ~600

Nutrient solution is:
7ml of Canna A+B
6ml of Hygrozyme
5ml of molasses

PH of Runoff: 7.0


why is my ph of the runoff higher? doesnt make any sense to me. thanks!

and her bottom leaves are starting to die more, look at her =(

...are you feeding daily ?

hmmm im still with you here bomb......who knows what it is man.....id say do this and it should definately solve your problem....since your using coco it drains really well, get about 3 times as much water as what you normally water with and use about 1/4 nutes. this should flush out your problem whatever it maybe. but obviously immediate help needs to be done to save your plant

oh also, i think you can cut the enzyme now mid- late flower

man that sure looks under fed.

I agree with buddin904, could be a salts build-up, especially if you're not feeding to the point of 10 or more % run-off every time to flush away excess salts build-up.

Coco is supposed to be fed daily, not like soils or promixes.
Leech the hell out of it and follow it up with an immediate feeding. Drop the hygrozyme.

This is why I've asked a couple times now... are you feeding daily ?

Raise PH going in to 6.1 to let MAG be more available. Keep it there for a week. I think this will help most of all, and is actually the problem your facing.

As stated above, flush first. In particluar, flush with 5.8 RO/distilled water untill run off is the same. I have zero problems when I do that, the plants just grow themselves.

Slowly up the PPM's also, particluary the Canna A/B to raise N levels a bit.

I'm not familiar with Hygrozyme, but is that dose high?

That should cover all possible bases, good luck.

why is my runoff at 7.0 if my putting nutes in at 5.5?

work2much:

do you suggest i add more cal/mag? and should i flush with distilled water?

i have been giving nutrients every time i water, infact i have never given them straight water. and everytime i have watered i give them atlest 20-30% runoff.

what really confuses me is how in the hell if im putting nutes in at 5.5 how are they coming out at7.0

also what do you mean by leech 10k?

my thinking is that maybe im not giving them enough nutrients but im not sure

thank you guys so much for your help i really appreciate it!!

no i think you are giving them plenty of nutes bomb....too much actually and too much water....such a small plant does not! need water everyday. let alone 2 days!

i think u think your underfeeding due to a nutrient lock out! take all our advices and def. give it a flush at least.

however i noticed the leaves do look indicative of heat stress/over feeding/over watering

the crinkles show heat stress
the clawwwws show over nute and/or over watering

jus flush em with loooooow nutes tho!

bombdotcom said:

why is my runoff at 7.0 if my putting nutes in at 5.5?

work2much:

do you suggest i add more cal/mag? and should i flush with distilled water?

i have been giving nutrients every time i water, infact i have never given them straight water. and everytime i have watered i give them atlest 20-30% runoff.

what really confuses me is how in the hell if im putting nutes in at 5.5 how are they coming out at7.0

also what do you mean by leech 10k?

my thinking is that maybe im not giving them enough nutrients but im not sure

thank you guys so much for your help i really appreciate it!!

Click to expand...

Too much salt build up. Also did you flush and check run off before using the coco? Even with Canna Coco which is supposed to be top end stuff you can use straight out of the bag I've found run off to be 7.1-7.2 with 5.8 going in initially. I know a lot of people talk about not ever having to check run off but I like to make darn sure my medium is the correct PH/PPM before I plop a plant in it.

Flush with distilled, thats all I use anymore untill I can get my RO back and I dont have any problems with distilled. Flush with 5.8 PH untill run off is the same and then for simplicty's sake just use A/B at around 600 for a feed at 6.1 and wait and see what happens. Cal-mag can wait. Instead of adding that were raising PH to make it more available. We can always add if that doesnt work but I doubt it, I stopped buying Cal/Mag a long time ago for coco.

I think your plants are big enough to handle the 600, mine are the same size and I'm at 1100 FNB with no problems, although of course every strain is different.

I water with every feeding, water ED in coco, and get some good run off as well, so no probs there.

Temps ok? Thought I'd ask JIC.

also what do you mean by leech 10k?

Click to expand...

Leeching is actually the correct common gardening term for what some folks call flushing.
To send a lot of solution through the planters to carry away excessive salts build ups.

The term flushing really started in the mmj cultivation world, referring to the practice of feeding lesser amounts of ferts in late flowering and finally just water in the last 5 or so days to help the plant use up it's own food stores for a smoother burning tasty smoke.

Many get the two terms confused with one another.

I'm not sure wtf is causing your run-off pH to be so high, but one thing is for certain that high of a pH could very well be causing serious defs of P, K and several micros Iron for one. I am speaking chemically damaged "within" your nute solution as it flows through the coco, not just it's element availability on a pH chart.

Personally, I'd leech it thoroughly with low pH'd water until the run-off is NOT coming out at 7.0, but more like 6.0. Then I would feed it at a lower input pH like you had when the plants were looking good. I'd mix a fresh batch of the canna coco with NO other additives included and feed her right after leeching (flushing) out the medium and getting the run-off lowered.

You mentioned this..

i just noticed that i was feeding them the past 2 weeks with ph of 5.2, i just now bumped it up to 5.8-6.2.

Click to expand...

You were feeding at 5.2 and everything was fine, then you bumped it to an input of 5.8-6.2 ? <- is this correct ?
I wonder "wtf" when you say "you just noticed". Did you have it at a 5.2 pH by accident or what ?
There is nothing wrong with running within a lower pH range fwiw.

When you "bumped it up", did you end up spiking it way up and then had to pH it down to get to the 5.8-6.2 you had adjusted it to ?
Are you certain about the input pH number ? <- meaning did you wait a couple hours and recheck the solution pH before feeding it ?
You tap water may contain a lot of bicarbonates causing your pH to drift up without notice after you've already checked it, pH'd it.
Outside of the possible element precipitation damage in the solution, your tap water may be the biggest culprit in the entire mystery.
(speaking of high bicarb level throwing off your pHing, and possibly other contaminants involved like sodium content)
If this is the case (bad tap water), you need to leech with ro or distilled water to leech out the built up bicarbonate and salts.

Changing pH drastically on a plants that is accustomed to a certain level can cause pH shock too btw.

Just curious why the hydroton on top of your coco ?

one other question...what did you use for a pH up when you 'bumped up' the pH ?

okay well about 4 weeks ago i stopped testing my nutrient solution after making it becuase i knew how many mls of each i had to put in it to lower the ph and get it to the right ppm so that my plants would like it.

i would typically add 5ml of canna coco (until my plants got bigger) + 1ml of apple cidar vinegar (to lower the ph)+ 5ml of blackstrap and +5 ml of hygrozyme.

I didnt accidently drop it to 5.2ph, over the course of me upping my nutrient solution of the canna coco from 5ml to 7ml i still continued with the apple cidar vinegar. When i was just using 5ml of canna coco i needed 1ml of apple cidar vinegar to bring it to 6.0ph. I kept doing that even when i upped my dose on the canna coco to 7ml and therefore it dropped the ph even more to 5.2. Yesterday i realized i didnt need the apple cidar vinegar any more with the higher nutrient solution (cause it naturally lowers ph, and my tap water ph is ~7.0).

I think my best bet is to just flush the hell out of my plants with distilld water till i get the run off wher ei want it. But damn man all of the lower leaves on my plant are now dead.

and your last question: i never used ph up (i would just use more tap water if i wanted), i used apple cidar vinegar for ph down.

i will check here in a couple minutes of the nutrient solution changes over time, i only check the ph right after i make it.

the whole theory with hydroton on top of the soil is actually very intresting. You may not be using all of your coco correctly meaning, when i first started i was using a clear 2liter bottle. The top 25% of the soil didnt have roots in, becuase everytime i watered the top 25% of the soil was getting disturbed by my water. By adding hydroton after 2 weeks the roots went all the way up to the top of the soil, therefore using more soil.

check out this thread its interesting

Maximizing root growth in soil containers:
http://www.rollitup.org/general-mar...ng-root-growth-soil-containers.html#post80945


also i appreciate your help man, seriously thanks for your time!

also people are saying im giving them too many nutes, then im giving them too little? Im confused which one My other plant that im giving the same nutrients is doing fine.
to the person that said i watered too much, i dont think thats the problem, ever since ive been using coco they have thrived on the heavy watering once a day

after checking the nutrient solution thats been sitting for 24hours the ph still remains stable at 5.8

what kind of light do u have? this will really tell whether you are using too many or too little nutes

150 watt hps.

I had to flush it with about 20 gallons of phed water at 5.0 ph to get my coco to run off at 6.0.
why do you think it took so much water at such a low ph to get my coco runoff down to 6.0?

seems your problem is........ you didnt go the soil route! looks like ph is way off in your containers making you plants lock out nutes and killing your plants slowly. its going to show nute probs being the lock out is not letting the plants take up what it needs when it needs it. flush flush flush