HELP! Leaves problem

[JCD]

Hi all, I am having a problem with the leaves of one of my plant. I have currently 2 Auto in my tent. I am at end of week 8. Medium is coco, lights are LED, water has 6.0 pH all the time. Both plants are treated exactly the same, however one of them has developed leaves that turns yellow and purple. See attached picks. Please advise! Thanks!!!

 

[SoOrbudgal]

My healthy plant is coloring like yours besides it's far along anyway looks like a low leaf

 

[PLreef]

My dark devils get the same coloring late in flower.

 

[Larry1]

JCD my leaves do the same thing when my temperatures get down in the cold. If the nighttime temperatures drop in the low sixties everything will start turning purple. Or I think fluctuate 20 degrees or more from day temp to night temp. The yellow leaves are from the plant finishing up its flower cycle and taking the nutrients out of the leaves. Lower nutrients(PPM) the better the smoke in the end. Looking good happy growing

 

[JCD]

Thanks for the replies! I don't have temperature fluctuations and it stays between 22 and 27C. Flowers just start to show coloured pistils so they have a long way to go! I hope this won't aggravate!

 

[Larry1]

I personally think it should be fine. Just about every one of my plants so far have turned some shade of purple. This is a picture of the last plant I chop down. If you notice the leaves on my mind did the same thing.

 

[JeffInCanada]

That's a nice looking plant Larry1 High yielder Wow!

 

[JCD]

Wow, indeed this is a nice plant! Congrats! Thank you for the reply. Cheers! JC