NEED HELP TO DIAGNOSE. PICS

Hi this is a Master Kush under a 600w MH with 3 other plants. About 1 month into veg. I noticed this curling and coloring on a few leaves of this plant only. Using cyco notes and PH to 6.1-6.3. The only thing is I ran out of room in my room so had to move into basement so it's like a constant 66 degrees but something tells me that won't cause this. Also it's in Pro mix medium

If I were to take a stab at it man I'd say some of it looks like heat stress where the leaves are cupping up in the second picture.

But then with the dark green colour and the yellowing on the leaves along with the red petioles it could be a Phosphorus deficiency, this can also cause the leaves to curl up.

Sorry if this isn't much help but I'm in the same boat but learning when I can.

PlantMeOut said:

If I were to take a stab at it man I'd say some of it looks like heat stress where the leaves are cupping up in the second picture.

But then with the dark green colour and the yellowing on the leaves along with the red petioles it could be a Phosphorus deficiency, this can also cause the leaves to curl up.

Sorry if this isn't much help but I'm in the same boat but learning when I can.

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Ya I find it really hard to believe heat stress cause like I said it never goes above 65 in that room.

How far down from the lights were the leafs that curled up located?

dgthumb said:

How far down from the lights were the leafs that curled up located?

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2-3 feet

Michael Warford said:

2-3 feet

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If you put your hand just above the plant, palm down, does it feel hot to you? If not then, I'd say you can rule out heat stress.

dgthumb said:

If you put your hand just above the plant, palm down, does it feel hot to you? If not then, I'd say you can rule out heat stress.

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Not at all. Can't feel it at all

Hi Michael, Could you tell me if that is starting at the bottom or the top of your plant ? and do you have a pic of the bottom side of your leaf that has the damage Please, Thanks I am doing some research on this and trying to find out what is causing this, I don't want to scare you, but It looks like somethings eating a path around the inner parts of those leaves, Thrips are not usually found indoors and we can't rule anything out, I am hoping its just stress from moving them to a cooler climate, Heat causes the tips to turn up but at your temps unless you have the lights right on top of your ladies I don't see that being the problem.
Its just the way them paths are going in different directions and not uniformed is baffling to me