yellowing leaf's veins - ph problem??

flpflp

Member

Veteran

• Mar 28, 2010

• #1

i am growing some industrial plants femi from dinafem seeds.they are in the 2nd week of flo.few days ago i found out that some of the leafs veins are getting yellow, then it's spreading on all the leaf.
ph level of water with fertilizers is between 6,5-6,8.i am using canna terra flo and four days ago i gave them some pk 13/14 [about 80% of advised dose]
photo:

 

Core

Quality Control Controller

ICMag Donor

Veteran

• Mar 28, 2010

• #2

to much food...ether P or K...... still did't figure that one out.......

 

flpflp

Member

Veteran

• Apr 5, 2010

• #3

one week later. things are getting worse...
i was watering with pure water with ph level stabilized to 6,5. also i flushed the sickest plant, but the problem is getting bigger

some photos:

first stage

second stage

as you can see it's not just fan leafs, but also younger ones from the top of the plant.
please help!

 

2

2Lazy

• Apr 6, 2010

• #4

I'll go out on a limb and say there is some kind of phosphorus issue going on. It's probably screwing with a whole slew of processes by locking up other nutrients in one fashion or another. I used PK 13/14 recently as well and got some similar results in my leaves. My nugs swelled really well, but I have a lot of burn on my plants that looks very much like yours. I thought it was related to light burn as my 400w HPS is only 6" away in a cool tube and it was only the upper leaves that seemed to just crisp right up.

I'm surprised and disappointed in this recent idea.

I think a flush might be in order.

Here's a picture of my OG #18 x Skunk from Reserva Privada (DNA Genetics Cali strains). I've removed the leaves that are more than 50% dead, but you can still see a lot of the burn.

 

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MickTheBrag

Active member

• Apr 6, 2010

• #5

help you man iam too stoooned too help you.


sorry man il help you. if your PH is good, try looking at your temps
and air circulation need a fan blowing on the tops.




just my 2 cents

 

flpflp

Member

Veteran

• Apr 6, 2010

• #6

i think that i solved the problem.today i watched my plants under magnifying glass, and i found some small insects taking sun bath under my hps lamp...tomorrow i go on war with them, i'm quiet shure that this bastards are responsible for my problems

 

J

jim_browsky

• Apr 6, 2010

• #7

What are your medium and nutes? It looks like in the first pic you
are using coco. If it is coco then you should drop your ph to
5.7-6.0. If it's soilless peat based mix then 5.8-6.3. 6.5-7.0 is for
soil.

It also looks like you have some pm on those leaf pics

 

flpflp

Member

Veteran

• Apr 6, 2010

• #8

i'm growing in soil and ph level is at 6,5 so it's ok.i think that those insects are guilty for all my troubles.

 

MickTheBrag

Active member

• Apr 6, 2010

• #9

yea those insects like the heat get the temps down too 25c if you can

its spider mites i think, get something organic as soon as you can and you should clear it up and finnish your grow fine.

heres hoping

 

flpflp

Member

Veteran

• Apr 7, 2010

• #10

i allready have some good shit for them,i want to start the war just before the light will turn off so i have to wait till tomorrow morning.
thanks
flpflp

 

C

cannabisology

New member

• Apr 7, 2010

• #11

flpflp said:

i allready have some good shit for them,i want to start the war just before the light will turn off so i have to wait till tomorrow morning.
thanks
flpflp

Click to expand...

Careful with spraying before the lights go off. Will raise humidity so dont do it if you have mold problems. Also, im not sure your symptoms are indicative of spider mite damage. Mites tend to attack weak plants so it could just be another symptom, not the cause. I SERIOUSLY recommend adjusting nutrients. I know I am always yapping about Dyna Gro but even if you just get an 8 ounce bottle for 5 dollars and give them a foliar application you can definitely correct your deficiencies and help the plants over all health.