Need Help with Identifying a Deficiency

F

Fury0117

Member
Hello, this is my first post and I’m sort of a newb so please don’t hate. I’m four weeks into flower on one of my plants and I’ve been having this issue for about a week where my plants leaves are turning yellow and purple/pink and their looking droopy a bit too. Also, this is mainly happening to like new growth or the top most part of the plant and the bottoms look fine. This one plant is definitely stunted too because the bud sites and trichrome growth is smaller. I’ve asked many different people about this problem and all have given me different answers like nitrogen deficiency, phosphorus deficiency, or over watering. At the start, the issue was only occurring in one of my plants but now some other ones are having the same traits and are getting worse.

Most of these plants are in 15 gallon pots (not in smart pots). Their under Gavitas right now at 600w. I’m feeding the Heavy 16 line (following the week 4 bud chart), along with calmag (5mls per gal normally), Terpinator (20mls per gal), Big bud (8mls per gal), and Kool bloom (anywhere from 3-5mls normally at this point tho I’m using 5mls per gal). My PH is always 6.2.

Picture of a leaf:
phosphorus-deficiency-leaf.jpg

Ok so for some reason it won't let me post my images in but maybe tomorrow it'll work. The above image is literally how most of my plant leaves look except worse, their majority purple/pinkish at this point with varying yellow and very little green except at the bottom of the plant. All I wanna do is upload a photo ); if someone can help me figure out this issue with the information that I've already said I'd appreciate it if not tomorrow ill hopefully be able to post some more pics for you guys of my actual plants.

Thanks for the help.
-Fury
 
Fury0117 said:
Hello, this is my first post and I’m sort of a newb so please don’t hate. I’m four weeks into flower on one of my plants and I’ve been having this issue for about a week where my plants leaves are turning yellow and purple/pink and their looking droopy a bit too. Also, this is mainly happening to like new growth or the top most part of the plant and the bottoms look fine. This one plant is definitely stunted too because the bud sites and trichrome growth is smaller. I’ve asked many different people about this problem and all have given me different answers like nitrogen deficiency, phosphorus deficiency, or over watering. At the start, the issue was only occurring in one of my plants but now some other ones are having the same traits and are getting worse.

Most of these plants are in 15 gallon pots (not in smart pots). Their under Gavitas right now at 600w. I’m feeding the Heavy 16 line (following the week 4 bud chart), along with calmag (5mls per gal normally), Terpinator (20mls per gal), Big bud (8mls per gal), and Kool bloom (anywhere from 3-5mls normally at this point tho I’m using 5mls per gal). My PH is always 6.2.

Picture of a leaf:
phosphorus-deficiency-leaf.jpg

Ok so for some reason it won't let me post my images in but maybe tomorrow it'll work. The above image is literally how most of my plant leaves look except worse, their majority purple/pinkish at this point with varying yellow and very little green except at the bottom of the plant. All I wanna do is upload a photo ); if someone can help me figure out this issue with the information that I've already said I'd appreciate it if not tomorrow ill hopefully be able to post some more pics for you guys of my actual plants.

Thanks for the help.
-Fury
Click to expand...
While waiting for pictures.
What medium are you growing in?
 
Kushash said:
While waiting for pictures.
What medium are you growing in?
Click to expand...
My bad I forgot to mention that. I am currently in a mix of coco and soil. Most of the time I try to get like 10%-20% runoff. Another thing is I'm feeding probably like every other day. Two feeds ago only fed Ph'd water with calmag and this fixed my salt build up issue with my ppms on runoff being to high, but this problem with the yellowing of the leaves started way before this water only feed. I also had a nitrogen deficiency week 2 of flower and I started mixing in nitrogen and it greened em all back up and it helped a lot but than after about 3-4 feeds I stopped using nitrogen on them because I didn't want to fry them at all and get nitrogen toxicity. Now on week 4 i got something much different and I don't know if nitrogen is the problem or what.
 
Fury0117 said:
you think its possible of it being both nitrogen and phosphorus? Also, I've never encountered a phosphorus deficiency before in any of my harvests so what supplement with phosphorus would you recommend me adding into my feed?
Click to expand...
You can use any of several PK boosts if that's what it turns out to be. Mixing coco and soil has never been an easy mix for me. The way coco locks up with wrong pH wasn't worth the head ache.
If stretch is over the need for N should fall WAY off.
 
Jypsy Dog said:
You can use any of several PK boosts if that's what it turns out to be. Mixing coco and soil has never been an easy mix for me. The way coco locks up with wrong pH wasn't worth the head ache.
If stretch is over the need for N should fall WAY off.
Click to expand...
Honestly at this point the last thing that I haven't tried is phosphorus so I'm hoping its that otherwise I'm just stuck in this rut and I wish i could post some pics because that would be way better for you guys to see whats goin on.
 
Last edited:
Can you upload a few more pics of the plant from a distance, in natural light, not just 1 leaf? For now, it can be the really off chance this has to do with molybdenum, my thoughts are phosphorus lacking, or getting locked out, possibly by the cold?
 
Blitz35 said:
Can you upload a few more pics of the plant from a distance, in natural light, not just 1 leaf? For now, it can be the really off chance this has to do with molybdenum, my thoughts are phosphorus lacking, or getting locked out, possibly by the cold?
Click to expand...
Finally got it to work. I sadly only have one photo of a leaf but tomorrow ill get a full picture of the plant and upload it.
 

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Fury; What are you temps running (lights on / lights off)? When you say you have a mix of soil and coco...can you tell us the percentages of both in your mix? Which Heavy 16 product/s are you using now? From what you noted it appears you're using more than 1 PK supplement (Big Bud and Koolbloom) Why would you think you still fall short on either? Can you provide a pic of the entire plant in question?
 
Blitz35 said:
In mid flower, she's hungriest! Did this leaf come from the bottom somewhere where there is little light shining? This last pic, the leaf again is showing lack of potassium! Need more pics of the plant to better know if this is a lockout or actual deficiency, but that leaf is for sure lacking potassium. If the leaf is coming from down low where it is not getting enough light, then it's not so bad, but it should still be noted how those leaves yellow and die off..as that is the nutrient the plant is searching for the most and taking it from those leaves it wants to shed off, first. Post some more pics when you can.
Click to expand...
nope came from the top part
 
CannaCountry said:
Fury; What are you temps running (lights on / lights off)? When you say you have a mix of soil and coco...can you tell us the percentages of both in your mix? Which Heavy 16 product/s are you using now? From what you noted it appears you're using more than 1 PK supplement (Big Bud and Koolbloom) Why would you think you still fall short on either? Can you provide a pic of the entire plant in question?
Click to expand...
temps are normally anywhere from 75 to 80, my lights are on 7am to 7pm. Sadly, I can't tell you how much coco/soil is mixed into these pots. For Heavy 16 tho, im using roots, prime, fire, finish, bud a, and bud b. I'll be able to provide a picture of the entire plant tomorrow.
 
Assuming that it is a deficiency in the first place...I'd place my bet on phosphorous. I would try adding a dose of some P-K booster and monitor it for a few days. The damaged leaves may not ever really recover, but rather the symptoms and leaf damage will not get anymore severe...that's how you'll know that they're having a good reaction. But this is all only assuming that a deficiency is the cause...seeing the whole plant will help. If it started on the newest growth, that would make me wonder. Phosphorous is mobile, so the plant should pull it from the older, lower leaves inwards to the buds, making them show first rather than the newest growth. But incorrected, the newer growth will also start showing the same symptoms.
 
This is why I asked if you knew the percentage of coco vs. soil. It's possible, if you have an overly high percentage of coco, and you're treating it more like soil, you could have issues. But without knowing the mix, it becomes a guess and less absolute. It's really hard to say otherwise, as to a possible cause and solution.
 
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