Which deficiency is it??? Need Help Please!!

[Nikolaus]

Hey guys anyone call tell which deficiency is it?
Started first with the older leaves. They're getting yellow, curved down and the veins are still very green.
I managed to get the temps and humidity okay. Watering every 2 or 3 days for now on...
Please help!
Doesn't seem like Mg deficiency to me...

Nikolaus Reviewed by Nikolaus on 12-05-2008. Which deficiency is it??? Need Help Please!! Hey guys anyone call tell which deficiency is it? Started first with the older leaves. They're getting yellow, curved down and the veins are still very green. I managed to get the temps and humidity okay. Watering every 2 or 3 days for now on... Please help! Doesn't seem like Mg deficiency to me... Rating: 5

[Nikolaus]

1.3m2 bathroom
E-indoor
E-soil,
E-
CSL-half bonsai soil half humus regular soil
SCL-
SCLR-
E-bathroom tap
E-Source water pH 6,4
HRT-)
E-5 weeks
E-10-10-10 0rganic Nutrients. 2 tea spoon each 1.5 lt. Used only once or twice
E-
E-400w HPS 2ftaway from plant
E-80s during the day 70s during the night
HD-Reservoir temperature
E- 50%
E-20/4
E-2 fans and one good exhaust fan

Ps. Those are automatic flowering Lowriders/Ak47

[WildFire.ca]

Is that happening more at the top of your plant then the bottom?

[Dreadscale]

Hi all !!!! :thumbsup:

I would look at a Zinc or Potassium problem myself.

Second post i seen in problems using Bonsi soil, I'm not sure about it but it looks like clay to me.

Maybe this will help http://www.rollitup.org/view.php?pg=...=article&id=37

[Nikolaus]

The tops are fine, just the older leaver are turning yellow.
I thought about Zinc too, but i'm not nearly sure.
And they're flowering, so I think they need help pretty fast...

[stinkyattic]

Test your runoff pH immediately!

[Weedhound]

I agree with Stinky the issue has to be ph. Good luck.....those are some pretty unhappy plants.

[Nikolaus]

Guys, I ran to an aquarium shop and got the ph test.
Well, you're damn right. The ph indicates little above 5!!!
So i got organic shell calcium to correct the soil ph.
Should i flush them all before the calcium??
Is that the right way to do it?
Thanks, i'm just waiting for a reply to save the babies!

[LolaGal]

I'd Wait for WeedHound or Stinky before you try anything. Hope they get better soon.

[stinkyattic]

http://boards.cannabis.com/plant-pro...hy-how-do.html
Follow the directions in here EXACTLY.
Your low pH has locked out all the metals. That's why it looks like a REALLY bad Mg deficiency.
When the soil dries out from the flush and pH adjustment, get that plant into a larger pot of an unfertilized potting mix such as promix that has plenty of lime in it, and give it tap water at pH 6.7-7.0. The soil in that pot has had all the lime used up and you are now seeing what the true pH of un-buffered peat is!