Newbie problem. Yellowing dying leaves

[Takid]

Okay. Thank you all for help. I will try my best and let you know how it worked out. I will probably come back with more problems :-)

 

[Takid]

Hello! I'm coming back to get some more help :-) So, yes. Looks like I was over watering a bit. Now I was giving them less water and I went through veg no problem.
Now I have a same problem which I had with previous grow.
The plants are yellowing and dying.

First symptoms showed up about 1 week after light flip. Yellowing leaves tips and on few leaves also yellowing margins, here's the pictures.

 

[Takid]

Sorry for double posting my phone doesn't want to cooperate..
Okay so after that the plants started yellowing from the bottom up. Some leaves are a little red.

One of the plants has some symptoms but is still mostly green. But has the smallest flowers. A while ago they all looked like that. So you can compare the colours..
Also one of them is in a smaller pot. They are all in 19 liter pots but one is in 11l pot.
The one in the small pot looks worst of all of them.

I feed them with biobizz nuts adjusting pH to 6.5.

Did a slurry test today on all of them using deionized water which had pH of 6. The green looking one had pH of 6.9 and the rest had ph 7.2 - 7.5. the one in smaller pot had highest pH.

Now, if I am using water of pH 6 for a slurry test and the result is 7.2 then I understand the true soil pH is even higher than 7.2? I will upload pics please tell me what do you think. And how to fix it :(
Also last thing. They get much worse after every watering. I water them and next day they look much worse. It's worse with every watering now. I'm thinking soil pH too high? But why if I adjust pH to 6.5? What should I do? And how to prevent it next time?

 

[Bigalmoby]

Wow that’s a lot of yellow
How fast did that get that way?
I have no clue hope this bumps you back up there for some help

 

[Takid]

I flipped on 15 October so almost 4 weeks ago. They started showing some problems a few days later maybe a week. So it took them around 3 weeks to look like that. They get a LOT more yellow after each watering. I must water them soon and don't know what to do. If I water them again now and change nothing they will go really bad I water them and next day they look tragic. It would be great if I could get some help. I'm doing something wrong and every grow is the same..

 

[Takid]

Does no one know the solution to my problem?

 

[Sunasun]

I flipped on 15 October so almost 4 weeks ago. They started showing some problems a few days later maybe a week. So it took them around 3 weeks to look like that. They get a LOT more yellow after each watering. I must water them soon and don't know what to do. If I water them again now and change nothing they will go really bad I water them and next day they look tragic. It would be great if I could get some help. I'm doing something wrong and every grow is the same..

You're feeding them, right? If you didn't water properly during veg, they won't have the root system developed to get through flowering.
Make sure your saturating the pot each watering and then allowing proper dry back until the pot is light weight wise .

 

[Takid]

You're feeding them, right? If you didn't water properly during veg, they won't have the root system developed to get through flowering.
Make sure your saturating the pot each watering and then allowing proper dry back until the pot is light weight wise .

Yes. I am feeding them with biobizz. Previous grow I've had problems with watering but this grow I watered them properly I would say. Before I changed the lights to flower the plants where looking really nice. I'm having this same problem every time. Every grow. Just after I change the lights to 12/12.
Slurry test came out 7.5. why does my pH rise? I think this must be the problem..

 

[Budtirement]

For the test I used the remains of my distilled water. 1 ppm and pH 5.9.
After doing the slurry test using this water I got a pH 6.4.
So, Should I guess that the pH of soil in a small pot was around 6.9?

Not sure but worth checking. A pH test of distilled water should be close to 7.0, although since there are few ions in distilled water, pH pens can have a hard time getting an accurate reading. If your getting 5.9 for distilled water you may have a calibration issue with your pH pen. Do you have calibration liquids and have you calibrated your pen recently? IDK, You may know more about pH pens and testing than I do but I thought I'd mention it.

My own best guess of the cause of yellowing of your plants is this. If you don't take your time and water thoroughly when you water, so that water saturates the soil to the bottom of the pot, the roots at the bottom will have a hard time and the plant will use the water it does get to keep the top of plant alive and let bottom leaves die. I say this because you have been feeding them so there's probably not a nutrient issue, (unless there is lockout). You can check by making a small cut in the side of the pot an inch from the bottom and stick your finger in there to see if it is damp or dry. The top of your plants are happy so that's the indication I'm looking at. Plants in flower have a more developed root system than veg so watering issues that weren't a problem early get noticeable later.

So that's my advice. Double check your pH testing and your watering method. I hope the issue is simple watering and not a pH problem. So much easier to deal with. Flowers are looking good!

 

[Takid]

Hi. Tha

Not sure but worth checking. A pH test of distilled water should be close to 7.0, although since there are few ions in distilled water, pH pens can have a hard time getting an accurate reading. If your getting 5.9 for distilled water you may have a calibration issue with your pH pen. Do you have calibration liquids and have you calibrated your pen recently? IDK, You may know more about pH pens and testing than I do but I thought I'd mention it.

My own best guess of the cause of yellowing of your plants is this. If you don't take your time and water thoroughly when you water, so that water saturates the soil to the bottom of the pot, the roots at the bottom will have a hard time and the plant will use the water it does get to keep the top of plant alive and let bottom leaves die. I say this because you have been feeding them so there's probably not a nutrient issue, (unless there is lockout). You can check by making a small cut in the side of the pot an inch from the bottom and stick your finger in there to see if it is damp or dry. The top of your plants are happy so that's the indication I'm looking at. Plants in flower have a more developed root system than veg so watering issues that weren't a problem early get noticeable later.

So that's my advice. Double check your pH testing and your watering method. I hope the issue is simple watering and not a pH problem. So much easier to deal with. Flowers are lookin great!

Hi. Thanks for the answer. I keep the pen calibrated. Check it roughly every 4 weeks.
The slurry test pH was 6.9 on the greenest looking plant. But the rest was above 7. Highest was 7.5 I think. I will double check my watering. I don't think I will save this grow as it is looking worse and worse. But maybe I could try to prevent it next time.
What can couse the pH to go above 7?
My water is soft, 72 ppm. I add calmag, nutes, then adjust pH. The soil is prebuffered and I dont temper with it. Can bad watering be the cause of too high pH? What could be other possible couses?

 

[Budtirement]

You can check your city water online at the web page for your provider and it will tell you the average pH, as well as other useful information.
As far as things that can make pH high, It's always a good idea to check everything you mix into the soil before you put it in so you can leave it out if its not right. I got a bag of compost once that was 8.5 but I didn't figure that out until after my grow withered.
Your plants look like you will get some bud off them before the end. Keep taking care of them as best you can and see what happens.

 

[Takid]

I've already checked the water report the best I could. My water pH is 7.5. Has low sodium levels. Ca 10mg/l. Mg 1mgl/l. I add some biobizz calmag, following what is says on the bottle for soft water. Then I add nuts and pH them with biobizz ph+ -.
I don't add anything to the soil. I added some compost once and it made no difference in yellowing.
I use biobizz soil which already has wormcastings and some other things. Also tried with bio canna soil and it was just the same. (Actually 2 plants right now have biobizz soil and other 2 biocanna soil).
It must be my watering then..

 

[Gmix]

Hello.
I'm a newbie any help will be welcome.
My tap water is 67 ppm and has a pH 7.5.
I use BioBizz nutrients.
With every watering I am adding 0.3ml/l CalMag as instructed on BioBizz chart.
I noticed that after adding CalMag and letting the solution sit for a few hours the pH rises, so I let it sit and then adjust the pH to around 6.5. I use a spray bottle not to over water.
After around 1.5 week the leaves started to twist, slightly.
Now they are more twisted and the bottom leaves start to yellow. Some of the leaves tips looks dropped. The plant on the picture has just been watered.
This is my second grow. I had same issues with previous one and the leaves continued to yellow and develop some spots/necrosis. They where dying pretty badly. At flower the whole plants were dying This grow starts to looks like the previous one from beggining and I'm worried. I'm posting pics of a new grow.
Will anyone help to diagnose those early symptoms?

Eh no ones picked up the fact your growing organically as bio nutrients are organic.

Your watering practices don’t look correct.
It’s possible you’re letting them get too dry before watering again
When they get to dry they pull up nutes like it’s drinking raw nutes

Ignore your pH I cannot emphasise that strongly enough you’re growing organically organic grows do not need pH adjustments

 

[Takid]

Eh no ones picked up the fact your growing organically as bio nutrients are organic.

Your watering practices don’t look correct.
It’s possible you’re letting them get too dry before watering again
When they get to dry they pull up nutes like it’s drinking raw nutes

Ignore your pH I cannot emphasise that strongly enough you’re growing organically organic grows do not need pH adjustments

Okay I will totally ignore pH.

Also, during next grow, I will conduct some tests on watering and find perfect way to water. I will let some plants dry a bit more and some a bit less. But if anything then I maybe let them dry too much and then underwater a bit.. I will find where the problem is.

Any further advice on my organic grow? Would you add anything to soil or top dress with anything during the grow?
Thanks for your reply

 

[Galgrows]

Take off all the dieing leaves too. I lift my pots to feel how dry they are.

 

[Greenthumb88]

Change soil pH w/ dolomite

Re: previous grow, 5.9 is too low, whenever soil or peat-based products like biobizz pH goes below 6.0 lockouts start.

Not rootbound. What I see is chronic overwatering. Stop with the spray bottle!

Water the entire pot until 20% run off, and then don't water it again until it completely dries out.

Beachbum lol man that’s a groovy name for a hippie

 

[Gmix]

I had to read what you’ve already been told and a few names gave you good information.


if you top dress, then you’ll have to factor that into what nutrients you’re using.

Personally I would do one or the other drop the bottle nutes and learn what your plant needs or continue with bio, but I don’t know about mixing the two as I use guano nowadays.
I have used it but found it troublesome measuring out this that and the next thing.

Honestly I’d figure your watering practices out first

 

[Takid]

Okay thank you all for help. I will keep trying.. hopefully it works at some point lol

 

[Newty]

General Hydroponics PH Down contains phosphoric acid and will lower soil ph.
Don't know if that's the problem but seen talk of high soil ph.

I replied to this thread months ago but seems these are different plants?
Autos?

I grew 1 Auto in a 2 gallon pot, had pretty much the same issues as you as soon as flower hit.
Yellowing and browning from the bottom up.
Never really figured out what it was but made it to harvest.

Currently growing 3 Blackberry Autos in 3 gallon pots using bottom watering.
As soon as flower hit, same issue again.

I'm not one to test ph when growing in soil but from advice I decided to test it.
Used an actual soil instant test and also did a slurry test, both came out 6.5-7.0

With ph good I investigated further and what I found was the roots grew into the bases, as soon as I fixed the root issue the plants started bouncing back and turning green again.
They're doing well now.

If I let the pot dry even a tad to much, the issue starts showing itself again so I make sure to keep up on watering.

Based on my 1st Auto grow having the same symptoms and only being in a 2 gallon pot, I believe it was also a root issue.

Point is, you may have root issues like I've experienced.
Especially if it's only happening to the plant in the smallest pot.

If they're photoperiods, could still be root issues but I've never experienced the issues growing Photoperiods in 3 gallon pots.

Next grow in my Auto tent will be with 5 gallon pots.

Just for reference, the pics below are what my leaves started to look like.

 

[Takid]

That looks very similar.
What did you mean when you said "the roots grew into the bases, as soon as I fixed the root issue the plants started bouncing back and turning green again."
How did you fix it? Do you mean they grew into those containers you have under you pot?
The plants are photoperiods. It's happening to all plants but at very different levels