Unknown Disease (with pics) Killing My Girls

Hey guys. Ive attached a few pics of this unknown disease my plants have got. I suspect its fungal in nature, but not 100% sure. This almost killed my young Pineapple Express (they survived and are now OK) and it is now attacking my Super Lemon Haze. Other plants dont seem to be affected (as you can see from the 4th pic).

Any ideas guys (and the first person who asked to know my pH is gonna get smacked...lol..its 6.7 as of yesterday). This is definitely not a nutrient issue AFAIK.

Sorry to bump this..but I could really use some help. Ill post some great bud shots of The Ultimate if someone can help...

first pic is overwatered, because you think it need more nutes and are watreing more, but its slight lockout

just because you ph is 6.7 is does not means is ok. Its depends on the nutes you are using.
if your water Ph is 6.7 and you add nutes to the water. it drops to the mid 5's. This mean your soil PH is too low. This will cause a lock out. You have to make sure your PH is around 6.7 when you give nuter. meaning you add Ph up to the nute solution.
You have a nitrogen deficiency.

The best way to check you soil PH is check the PH at runoff when you flushing which you probably need to to for the bad ones.
(PH of water + X )/2 = Run off

Find "X" thats the Ph of your soil. If it not around 6.7, then thats what causing your issues.

Thanks for the Rep

Thank you Ocean! I normally test my run-off Ph with a digital tester and it routinely registers 6.5-6.7. You are right that first pic was just watered with a light BioGrow solution. I appreciate the help!! Im letting the soil dry out now and plan to add a N rich booster in a few days. Im hoping they improve..but if they dont I still have over 20 clones which are healty so no biggie if I lose them. I just wanted to hold onto the genetics of Super Lemon Haze which has such a great reputation. All of the seedlings of the Super Lemon Haze have been really weak and "fussy" about their nutes. Gotta love my AK-48 and Blue Widow..they are some of the toughest plants Ive ever seen regarding stress and such.

If it were mine I would take it out of it's pot, shake off most of the roots, cut back to the third node and replant. I think it's salvageable but not for much longer.

dannyboy602 said:

If it were mine I would take it out of it's pot, shake off most of the roots, cut back to the third node and replant. I think it's salvageable but not for much longer.

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I appreciate your input..would you please explain why you think this would be a good solution and what problems it would solve? I could do this tomorrow morning as Im planning on up-potting some seedlings anyway.

maby u have a ph fluxuation or ur starting to et a toxicity

Do you calibrate your digital PH tester?

ive had 3 different ph meters and ive had to calibrate each one u could think ur at 6.7 when really u could be at 5 or 8

skunkpunk13 said:

ive had 3 different ph meters and ive had to calibrate each one u could think ur at 6.7 when really u could be at 5 or 8

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It looks like this person said exactly what I was getting at. Make sure your PH tester is calibrated correctly otherwise you will get inaccurate readings from your tester.

A cheap backup plan is PH drops. It looks like that 1st picture showed overwatering but also PH issues.

xxRolandxx said:

Thank you Ocean! I normally test my run-off Ph with a digital tester and it routinely registers 6.5-6.7. You are right that first pic was just watered with a light BioGrow solution. I appreciate the help!! Im letting the soil dry out now and plan to add a N rich booster in a few days. Im hoping they improve..but if they dont I still have over 20 clones which are healty so no biggie if I lose them. I just wanted to hold onto the genetics of Super Lemon Haze which has such a great reputation. All of the seedlings of the Super Lemon Haze have been really weak and "fussy" about their nutes. Gotta love my AK-48 and Blue Widow..they are some of the toughest plants Ive ever seen regarding stress and such.

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Welcome,
Take into account TDS/PPM and your water supply.
Nutes lower PH but increase PPM. You want to hit your PPM target and have the right PH as well.
If you pick your nutes wisely you can have your PPM( nute strength) target and PH at the right levels. This is what maximizes growth and result!!
Look at a PPM chart for Soil. Look at the level of PPM You should have for Vegging or the stage of growth you are in. Lets say 600-800 PPM for vegging

1. Get your water at get the nute strength to 800 PPM. Check the PH at that PPM. It should be fairly close to your desired goal of 6.5-6.8. If not add some PH UP or Down to get to that Level
2. Water your plant. It that simple if you know the science. In soil Soil EC/PPM requirements increase as your plant develops and goes into flowering.
3. take into account the TDS conversion. EC is universal. and can be converted to TDS .5 or TDS .7. You want to use the .7 conversion as its the standard for most charts. SO, if your EC is 1.0 then your PPM is 700.
4. Tap water has salts and other stuff in it, so sometimes, when you add nutes it cancels out some of the salt and additives and eliminates some of the PPM value in the tap water. You can just add more nutes to reach your PPM goal, even if you have to add more than usual and your numbers seem low.
5. Get your watering schedule on point. wait til the top soil is somewhat dry.

Hope this helps

smokebros said:

Do you calibrate your digital PH tester?

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Of course. I have ph neutral water which came with the tester to reset the sensor.

oceangreen said:

Thanks for the Rep

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how pompous of you.

rzza said:

how pompous of you.

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haha, just a joke, mate

Please to explain... The last pic in the series. Is that what they look like now? Because those in the last pic look healthy. How many plants are droopy like the other pix?

Can you tell us about your setup, saves people having to guess. Lighting, air intake, air extraction, pH, E.C, temps, soil type etc

dannyboy602 said:

Please to explain... The last pic in the series. Is that what they look like now? Because those in the last pic look healthy. How many plants are droopy like the other pix?

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As I said in the OP the other plants didnt seem affected, it was only those 3 plants having problems. Even though all of them are under the same conditions (same water..nutes...etc).

To the guy who asked about my set up: In my preflowering room I have (2) 85 watt CFLs and (1) 65W CFL (real watts, not equivalent) They are in a peat based soil mix with 15% perlite and they are fed with BioBizz Root Juice and BioGrow (root juice is stopped after 2nd week).

I actually figured out the problem. After examining the roots of one which died I found a nasty infection in the roots (it was nasty and liquifiying the roots..I wore gloves and sterizlied the pots after). I think it was from bad soil (there was a deal on some soil at the garden center which I should have known was too good to be true). Those 3 got some of that soil which must have been infected. 2 survived and are recovering (but I may kill them anyway because they are recovering slowly and I need the space for more clones).

Thanks for everyones help! It was much appreciated.