F21, need help identifying what is wrong with this plant

I am on day 21 of flowering. I just raised the 315 CMH that is directly over this plant from 17" to 22" this morning in case this could be something to do with light burn. I am growing in great lakes water only soil. I use de-chlorinated tap water PH adjusted to between 6.2 - 6.8, varying each watering.

I have another plant from the same strain (Mazar), but the other one does not have this issue and I have treated them the same. The other plant is under a 230 true watt QB 96 v2. The plant was vegging under the QB 96 prior to being put under the 315 CMH around 6 weeks ago and didn't have this leaf coloration at the time, looking very healthy.

Temperature is 76 - 79 lights on, 66 - 69 lights off. Humidity has been between 43 - 50.

I wondered if anyone can help identify what could be causing this appearance.

It started looking like this a few weeks ago, it may be spreading but I am not sure.

Well the 4th pic(3.jpg) has a curled tip... But other than that, it just looks like its purpling. What are your temps during day and night?

nvm. I see them.

I say Autumn Color Effect is taking place. If they turn brown, panic. Otherwise they are SUPPOSED to turn yellow red and purple as she finishes.

Some growers like it green though. That's their prerogative I guess.

I agree ... purpling ... maybe a slight dryness from a lower moisture day or a sweet spot in the light footprint

Putting the autumn colors aside, your plant is showing a Mg shortage; yellowing between your veins and the purple stems. I would maintain my pH @ 6.5...much lower and you're missing Mg uptake.

CannaCountry said:

Putting the autumn colors aside, your plant is showing a Mg shortage; yellowing between your veins and the purple stems. I would maintain my pH @ 6.5...much lower and you're missing Mg uptake.

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"I am growing in great lakes water only soil."

I disagree. I see the leaves yellowing because the plant is depleting it's own Nitrogen. It's the fade. It's what you work for when you choose a pre-amended water only soil.

There may be a bit of over watering going on with that plant now that I look closer and re-read your post. It does look a little splotchy. If the other isn't then 100% it's you doing something. You're only watering. So we can surmise that's the "issue".

KingQuazy said:

"I am growing in great lakes water only soil."

I disagree. I see the leaves yellowing because the plant is depleting it's own Nitrogen. It's the fade. It's what you work for when you choose a pre-amended water only soil.

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I have this plant in a 7 gallon fabric pot. They sprouted on April 26th. So grew for 82 days before flipping.

I started with 2 seeds, both mazar. I cloned one of them, which grew quicker and also have that one flowering. That one is in a 5 gallon pot but only vegged for around 4 weeks. It got big fast and appears very healthy and green. The plant that it was cloned from started becoming very light green all of the sudden, seemingly for no reason.

My theory is that the plants are possibly lacking in nutrients all around, since the size of the pot cannot fulfill it's demands. I just put some dry amendments (Dr. Earth Flower Girl, used a 1/4 cup and 4 cups of water. Says to use 1 cup per plant. I also threw in a handful of earth worms and have this mixture bubbling with an aquarium pump and 2 air stones. I planned to give it some tomorrow, as I already watered this morning. They are drinking water rapidly at this stage. I thought they could use some additional nutrients to help them the next 4 or 5 weeks in flowering.

This is based on the fact that the clone of the one still looks perfectly fine and vegged for less time, while the others may have either used up too many of the nutrients or can't uptake enough fast enough.

What do you think of this plan?

I attached an image of this products specs.

Yeah hell yeah.

Foot in my mouth all day lol

3 months veg ate all the chicken. For sure.

Here's some pictures of all of the plants together. The one labeled clone is the 5 gallon one that vegged less time, on the left in the pic with all the plants. The mother of this one is on the right and the original plant is in the back.

I was just scared to add this "amendment tea" due to what looked like it could be nutrient burn on some tips already.

I have 675 watts between the three of these plants. The back one has a 315 cmh, the mother of clone 230 watt QB96, and the clone a 130 watt with samsungs h series leds & uv & samsung far red leds.

KingQuazy said:

"I am growing in great lakes water only soil."

I disagree. I see the leaves yellowing because the plant is depleting it's own Nitrogen. It's the fade. It's what you work for when you choose a pre-amended water only soil.

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Fading at 3 weeks in? I hope it's a 5 week strain.

So the consensus is that it most likely needs more nutrients in general?

CannaCountry said:

Fading at 3 weeks in? I hope it's a 5 week strain.

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My plants definitely pull their own N for 4+ weeks and still have a little left. 8 week strain.

neuromorphic said:

So the consensus is that it most likely needs more nutrients in general?

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definitely. You should have top dressed or reset it on top of another mound like a few weeks before flower. You added an extra month to the feeding cycle and didn't provide an extra months food.

I started them in cups, then 1 gallon, then moved to the 7 gallon. It was moved though on about June 8th, so it was in the 7 gallon for like 5 or 6 weeks before flipping. I did add some top dressing of 4-4-4 dry amendments about 2 weeks ago, but didn't add that much, may have not been enough.

Here's what it looked like not long before it lightened.