Problems In 5th Week of 12/12?

Well, I've been running 12/12 now for roughly 5 weeks and the buds are starting to swell up nice, but there seems to be quite a bit of purple and yellowing going on. I've grown this strain before under my led and there was a little bit of purple near the end of 65 days of 12/12, however this is my first time using the cmh in there as well.. not sure if it's because of a deficiency, genetics, or some other variable.



Thoughts?

What are your off and on temps

I'll be damned if I can figure it out, but I think it's more than temperature. What medium are you using? What's your PH, your watering schedule, nute strength and type? It kind of looks to me like a combination of a nutrient problem and a watering problem, but I can't put my finger on it. Looks a little like a phosphorous deficiency, but it seems early in bloom for that. Some parts of it look like a lockout, but it could also be a micronutrient deficiency. I've seen pictures of copper deficiency that looked a lot like that, but never actually saw the condition in person.

Bose said:

What are your off and on temps

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70-84 according to my meter

Skunk Baxter said:

I'll be damned if I can figure it out, but I don't think it's temperature. What medium are you using? What's your PH, your watering schedule, nute strength and type? It kind of looks to me like a combination of a nutrient problem and a watering problem, but I can't put my finger on it. Just a gut feeling.

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I'm using hydroton in 5 gal bubble bucket. PH is sitting at 5.8, and as for nute strength and type I'm just using the same stuff I started with.. floraduo series and last I checked was 80% full strength according to my tds meter.

Sorry, man, I edited some additional information into my post before you replied. After I hit "post," it nagged at me, and a couple more things came to mind. Not sure how useful they are.

Sounds like your numbers are good, but this is really weird. Just a shot in the dark, but I wonder if adding the CMH lighting changed the way the plants take up your nutes? I'm really baffled.

It could be a question of a different phenotype than what you've grown out before even if it's the same strain.
For example, Pineapple Fields has four distinct phenotypes, only two of which have purpling in the leaves.

Skunk Baxter said:

Sorry, man, I edited some additional information into my post before you replied. After I hit "post," it nagged at me, and a couple more things came to mind. Not sure how useful they are.

Sounds like your numbers are good, but this is really weird. Just a shot in the dark, but I wonder if adding the CMH lighting changed the way the plants take up your nutes? I'm really baffled.

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I'm honestly quite baffled.myself.. at first it looked like a phosphorous deficiency, just because I knew that could potentially cause some purple. However, seeing that I am up on my nutes.. I'm not sure what it could be. I believe that particular plant had some root issues when she was young.. stiffened way up and nearly lost her. A couple of months ago she was a couple of fan leaves left on a rock-hard stem.

jeroly said:

It could be a question of a different phenotype than what you've grown out before even if it's the same strain.
For example, Pineapple Fields has four distinct phenotypes, only two of which have purpling in the leaves.

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Well that's the thing -- I've been using clones since my only seed pop several grows ago. It's the same exact pheno that I grew previously. There was never purple like this.. not even at the end of the flowering.

JohnCee said:

I'm just using the same stuff I started with.. floraduo series and last I checked was 80% full strength according to my tds meter.

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what ratios are you using for floraduo? i've been using it this grow and love the results so far. just curious how others use it

Definitely phos lockout. Some plants do it naturally, others do it by temp. Some of the ogs I grow like an insane amount of phosphorus during flower. I would make sure you don't have salt buildup /lockout before your feed them high phos though because it looks like you have clawing and nute burn on some of your water leaves. Looks healthy other than that.

What strain is it?

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