Trouble in paradise

Can anyone give me a hand on these darkening leaves? Some are bright and some are turning quite dark. Pics attached.
Fox Farms Ocean Forest soil.
Fox Farms nutes...(every other watering 2-3 days in between watering) and much lighter than their published schedule.
Tight temp control from 74-80. This is done by using external controller to operate a window AC which is pumping cool air into tent 4 inch opening when called for. Added another pic to show this setup.
Humidity is uncontrolled but monitored. Runs 40-65RH.





Thank you?

They look good to me so far, the new growth will usually be lighter in color and darken with age. If they get real dark you can cut back on Nitrogen, but I wouldn’t worry yet.

If using LED , try raising it , and then increase intensity slowly

Nizza said:

If using LED , try raising it , and then increase intensity slowly

Click to expand...

Giving this a try. Thank you

priestriver said:

Giving this a try. Thank you

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gotta say though that plant is growing fast, and lush

what medium and lighting and temperatures/humidity do you have?
what nute schedule/regime?
what genetics?
what size room?

all of these play a big part in your plan to flower the plant, and I agree with hook daddy, the new growth can look Lighter at times, but also it can be the new growth getting too close to the light source.

great looking plant! Hope you achieve your goals you're doing great!

Nizza said:

gotta say though that plant is growing fast, and lush

what medium and lighting and temperatures/humidity do you have?
what nute schedule/regime?
what genetics?
what size room?

all of these play a big part in your plan to flower the plant, and I agree with hook daddy, the new growth can look Lighter at times, but also it can be the new growth getting too close to the light source.

great looking plant! Hope you achieve your goals you're doing great!

Click to expand...

Added notes and pics to original post. Thank you!

The plants look fine, new growth is usually lighter and darkens as the chlorophyll matures. I wouldn’t change anything.