Browning, yellowing, bottom leaves, moving up *PICS*

I have clippings from different parts of the plant showing different progressions of this issue.

-400 HPS
-70-80 F
-20-50% Humidity
-18" distance from light
-week 6 ( just started flowering )
-strain : ICE
-Hydroponic DWC
-FoxFarm feeding schedule (feeding at 75%)
-Grow Big
-Big Bloom
-Tiger bloom
-Micro brew
-kangroot
-Sledgehammer flush (1 drop per gal)

has had issue since week 2
the start with tiny brown spotting randomly thru center of older leaves,
also has dry crispy texture to them once brown spreads,
yellow doesnt take affect until majority of leaf is brown and dead.


What have i tried?

-1tsp. Epsom salt foilar feed
-1tbs per gal resi

flushed after week of no results

-1tsp Garden Lime foilar
-1 tsp. per gal resi

flushed after week of no results

now giving Cal-Mag at 1tsp per gal
also have foilar fed once at 1tsp per gal
-----------------------

i Havent seen results yet going on day 3..

any help will be awesome

if cal mag doesn't work i would try getting a good fert with a lot of nitrogen in there. Good luck

What size pot are they in? This started happening to mine and they needed to be moved to bigger pots.

yellowing from the bottom up is nitrogen deficiency. but those pics dont look like yellowing, that looks like death bro.

try taking pics of the ENTIRE plant, and not just of leaved you picked off. that gives us a good idea of whats going on.

yea whats the pH?

lmao looks like death bro, is it in vegetative or flowering?
veg right?

nick17gar said:

yea whats the pH?

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^^ right there man, get your soil tested and do it right, looks like you have a lockout.

find a local garden store or home depot, agway, lowes and just bring in a good soil sample, not just a bit of shit off the top you want to get to the soil on the botom/middle and dont be afraid to take samples from different spots.

alternatly you can pick up a cheap soil PH test kit. i find these work good but take a bit more patience

http://www.amazon.com/Luster-Leaf-1612-Rapitest-Tester/dp/B0001LEPYA/ref=sr_1_1?ie=UTF8&qid=1335236273&sr=8-1

the cheap digital ones i wouldnt trust.

if you r PH is low (6.5-6.8 is ideal range) the get some garden/dolomite lime and treat it. personally i think that mixing up some soil and amending the lime right in to the soil @ 1tsp per gal is the most effective way but you can mix in water and top dress and water it in as well, that does take longer though to take effect.

this plant is in a hydroponic dwc (not soil)

size of the container is not an issue

i have a Hannah digital pH meter keep my pH at 5.5-5.8

i also have hydroponic pH up and Down...

epsom salt and garden lime were lowes alternatives before i got cal mag, so im waiting to see if cal mag does anything, and i decided to take a couple pics of those bad leaves i trimmed off..

and i didnt post these earlier cause their taken with HPS (which of course makes it hard to see plant colors) but since someone asked these are the most recent

It looks like its dying from something. If not the PH then some sort of deficiency? I've never seen this before. It's odd because the rest of the plant is completely healthy. It's just those particular leaves that are dying.

Which area of the plant did you cut them from? Were they too close to the light? Did they come in contact with something they normally wouldn't? Narrow it down to specifics and you'll find out what the problem i s.

took more pics of the plant, some leaves are newer fan leaves some are older, but it seems to only attack fan leaves..

leaving them dry, brittle and tiny brown / bronze spots, with no yellowing..

have done hours of research and i know it has to be a nutrient issue since all environmental issues are in good ranges..

checked pH again its at 5.6..

some leaves have a necrosis almost similar to a phosphorus def, but i do not beleive that is an issue..

Everyone seems to have good results with FoxFarm Nutes, but i have seen to have hell with it.. will definitely be trying dif nutes after..

if u have fox farm please feel free to put input in on ur feeding regiment (i remind you that this is hydroponic), ( but i also have some plants in soil ) as a test to see which is easier and less work.. and see the results in my own opinion between the two

Sweet heavens...see how the tips are dying and then receding back..it looks like hydro overfert to me...I killed numerous plants in just this way...so try giving them nothing to eat and see if they look any better

missnu said:

Sweet heavens...see how the tips are dying and then receding back..it looks like hydro overfert to me...I killed numerous plants in just this way...so try giving them nothing to eat and see if they look any better

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In your honest opinion , what do you believe the EC / PPM should be at 6 weeks. (5 weeks veg. 1 week flower)
start with tap water that has a PPM of 29. it sits in a 18 gal container with airstone to ensure no chlorine .

i just check the ppm and its at about 450 and the EC is at 0.9 , no way could i see this being over fert, if anything its under i would think??

i have gotten the PPM in the 800s and EC at 1.6 which is what the feeding schedule called for and was still having issues?

what causes the leaves not to get water? the entire plant from top to bottom is dry?

i can hold my hand on my cool tube and while i can feel a little heat but i can leave it there forever with out the slightest discomfort?

please help, the leaves are progressing rapidly

I think I have something similar going on I'm my compost plants.
[video=youtube;Gs0QOBaPBLI]http://www.youtube.com/watch?v=Gs0QOBaPBLI[/video]

i might be wrong but it looks like a basic nitrogen def..

and please can anyone help me with this issue.. im about to add more nutes, because the leaves are progressing so quickly that they will be dead in 2 days...

the entire plant has NO water on leaves.. they are so dry its makes a paper noise when the fan passes thru them.. i am getting desperate..

please can someone tell me why they are so so so dry

I've been chasing this dragon for over a year now and I feel your pain. It always starts at about week 6 from seed and attacks the fan leaves at the bottom and works it way up. Kills the bottom fans then starts working on the smaller leaves on the bottom. Fan leaves will get spots and then start dying on the leaf tips, and then curls in. Rest of the plant looks fine and healthy. Buds are not affected however the way the fans drop, you would think it would. Am I in the ballpark on your problem???

If so, then I have no clue what the answer is. The good news is, it will not kill the plant. ( At least in my exp.) I have tried flushing, ph adjustment, extra magical, spray treatments, ect. I have given up trying to cure this. Main reason I sighed up is to find the answer to this problem.

Setup is dwc hydro with top drip. Using hydroton, rockwool, and technaflora products. Ph 5.8-6.3 Ppm is 800 in veg and 1200 in flower.

Edit* Just remembered reading somewhere that when you mix up your solution, add your calmag on a different date. Phosphorous will bond to calcium and/or iron making them all insoluble compounds.
The P might be almost locked out since the bud is using alot of it leaving little for the leaves. It's the only thing I can think of.

yeah pretty much having the same issue,, ph seems high for hydroponics from what i read

I start low and let it creep so it can hit all the ranges for max intake of different nutrients. 5.5-6.5 is my min/max.

I've read the whole thread.

The only thing that I can think of is that the RH at 20% is way too low and they are constantly dissipating moisture and not taking in the food. In this case (and also in Summer) it is worth remembering that the food had to be more diluted to keep up with this extra transpiration work. I wonder how they would react if you kept it at 50-55% RH and temp 20-27 deg C.

lahadaextranjera said:

I've read the whole thread.

The only thing that I can think of is that the RH at 20% is way too low and they are constantly dissipating moisture and not taking in the food. In this case (and also in Summer) it is worth remembering that the food had to be more diluted to keep up with this extra transpiration work. I wonder how they would react if you kept it at 50-55% RH and temp 20-27 deg C.

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i have a humidifier that i keep off during flowering because ive always read that the lower the humidity the better during flowering, that some even get down to single digits. and during veg 50-60... so is this not true?

Try repotting them with new special soil, I use biobizz. When a problem arises I can't fix, a repot usually works.