All tops are turning yellow

Mobileaudio25

Active Member
I'm going to go with potassium deficiency and possibly trace elements deficiency.

Do they seem stretchy?

Are the stems and stalk weak?

:leaf:
Some are stretchy some are not. It's Gogi og so it's a sativa dominant plant. I have noticed The stems seem more weak than usual especially at the top. I use calmag and spray and grow foilar spray for my trace elements as well as nitrozyme.
 

Mobileaudio25

Active Member
Here are a few picture updates . I'm losing a few branches if not plants on my ak and possibly one of the jellybean. Thankfully my Gogi og are taking the abuse well. I flushed today with a 5.6 ph with 5ml calmag and 2ml a/b. Raised the light a few inches too. I put them into flower a day ago. I hope not to lose any but I need to sex these Gogi I'm running out of space
 

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Mobileaudio25

Active Member
Looks kind of like an Iron issue..
I was thinking iron deficiency as well. My only thing is I don't see how I can have an iron deficient if I'm using calmag which has iron in it every watering and I foilar spray once a week with micronutrients that have iron. I always ph to 5.8 which is right where iron is best absorbed by the plant.
I do have small dark brown spots on my plants also on lower leaves which makes me think possibly manganese deficiency since manganese isn't absorbed that well at 5.8 it like 5.5-5.6 more so. What do you think?
 

714steadyeddie

Well-Known Member
I was thinking iron deficiency as well. My only thing is I don't see how I can have an iron deficient if I'm using calmag which has iron in it every watering and I foilar spray once a week with micronutrients that have iron. I always ph to 5.8 which is right where iron is best absorbed by the plant.
I do have small dark brown spots on my plants also on lower leaves which makes me think possibly manganese deficiency since manganese isn't absorbed that well at 5.8 it like 5.5-5.6 more so. What do you think?
IMO its salt build up and throwing your PH off. Do you alternate feed feed, feed, then water (1/4 Strength). The leaves look pretty health shade of green, don’t make sense to keep pumping them with strong nutes if there not eating in the first place.

Try to get good runoff for the next few times, when I get yellow tops or slow growth I usually do that and they turn around in a weeks time.

Try to use some humic acid as well. I use fulpower
 

Mobileaudio25

Active Member
Is your pH pen calibrated?? Had that happen B4. Was off a full point and a half.
Yep it was calibrated. I had checked it to make sure and it was on but I just recalibrated it anyways. I've had some yellowing when I first started coco but learned I needed a little more calmag. I've never even lost a plant before until this run. All nutes and pens are new as well as pots. All I've done is added in spray n grow (once ever 2weeks) and azos (which I've only used 2 times in 2 month veg). I almost religiously ph to 5.8 I'll check one gallon out of the 5 so some may be a .1 up or .1 down ph but never had anything this bad. I think it's a lockout or a bad deficiency
 

Mobileaudio25

Active Member
IMO its salt build up and throwing your PH off. Do you alternate feed feed, feed, then water (1/4 Strength). The leaves look pretty health shade of green, don’t make sense to keep pumping them with strong nutes if there not eating in the first place.

Try to get good runoff for the next few times, when I get yellow tops or slow growth I usually do that and they turn around in a weeks time.

Try to use some humic acid as well. I use fulpower
Honestly I'm not the best when it comes to watering until runoff. I vegged this run about 2 months and only watered until runoff about 3 times. I only feed every 4 days or so. I noticed more growth when I did it every 2-3 days but still never until runoff. My roots look amazing every transplant very white and strong with a lot of root hairs.
I haven't measured runoff ph, but I just gave each plant 5gal plant a gallon of water. They were transplant a week ago and some of the pots had runoff some didn't. I did RO water, 5ml calmag, 2ml canna a/b. 546 ppm 5.6 ph
 

714steadyeddie

Well-Known Member
Honestly I'm not the best when it comes to watering until runoff. I vegged this run about 2 months and only watered until runoff about 3 times. I only feed every 4 days or so. I noticed more growth when I did it every 2-3 days but still never until runoff. My roots look amazing every transplant very white and strong with a lot of root hairs.
I haven't measured runoff ph, but I just gave each plant 5gal plant a gallon of water. They were transplant a week ago and some of the pots had runoff some didn't. I did RO water, 5ml calmag, 2ml canna a/b. 546 ppm 5.6 ph
Try to aim for a good water to run off at least once a week. Really helps especially in coco
 

Mobileaudio25

Active Member
Try to aim for a good water to run off at least once a week. Really helps especially in coco
I will definitely make sure I do that from now on. Do You thinking I'm dealing with a salt buildup white is causing a lockout then? Some others mentioned varying my ph some. I watered a gallon each one with 5.6 ph should I bump the next one up to 6.0 ?
 

714steadyeddie

Well-Known Member
I will definitely make sure I do that from now on. Do You thinking I'm dealing with a salt buildup white is causing a lockout then? Some others mentioned varying my ph some. I watered a gallon each one with 5.6 ph should I bump the next one up to 6.0 ?
Honestly I use the GH ph up and down test kit, so I go by color of the solution. I’m sure it’s never exactly at 5.8 maybe between 5.9-6.2 so they may have a point. Just try it out won’t hurt
 

whitebb2727

Well-Known Member
Honestly I'm not the best when it comes to watering until runoff. I vegged this run about 2 months and only watered until runoff about 3 times. I only feed every 4 days or so. I noticed more growth when I did it every 2-3 days but still never until runoff. My roots look amazing every transplant very white and strong with a lot of root hairs.
I haven't measured runoff ph, but I just gave each plant 5gal plant a gallon of water. They were transplant a week ago and some of the pots had runoff some didn't. I did RO water, 5ml calmag, 2ml canna a/b. 546 ppm 5.6 ph
That's a big issue.

You need run off to prevent salt build up. Two months and so little run off has to be built up causing lock outs.

Do you have a tds meter to test how much salt is in the run off?
 

Mobileaudio25

Active Member
That's a big issue.

You need run off to prevent salt build up. Two months and so little run off has to be built up causing lock outs.

Do you have a tds meter to test how much salt is in the run off?
Yes I do. Should I just catch some runoff test it and compare to the ppm I just flushed with? A higher ppm will tell me salt buildup
 

Mobileaudio25

Active Member
I'm afraid some of these are beyond repair. How long does it normally take to kick back into gear a week or so? Should I defoliate any really bad leaves?
 
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