Purple Dots @ Stem Nodes?

I have noticed--yes, for the first time after 14 weeks--that there are these little purple dots that appear on the nodes of where the stem becomes leaf. It seems to be a trait concentrated around the 2 larger girls as well as toward the canopy more than the sub-canopy. Anyone know what it could be?
Theres NO WAY its a K or P deficiency, the feeding schedule has remained the same for 14 weeks and has only increased in P and K, not decreased. They're neither over-fed nor over-watered.

This one does contain the purple dot. Notice, too that it is on a more mature branch. That is something I'm just now realizing.

This one, as you can see, doesnt have the purple dot. Less mature branch.
Thoughts?

Thanks!

Jack Kilgore said:

I have noticed--yes, for the first time after 14 weeks--that there are these little purple dots that appear on the nodes of where the stem becomes leaf. It seems to be a trait concentrated around the 2 larger girls as well as toward the canopy more than the sub-canopy. Anyone know what it could be?
Theres NO WAY its a K or P deficiency, the feeding schedule has remained the same for 14 weeks and has only increased in P and K, not decreased. They're neither over-fed nor over-watered.

This one does contain the purple dot. Notice, too that it is on a more mature branch. That is something I'm just now realizing.
View attachment 4187046
This one, as you can see, doesnt have the purple dot. Less mature branch.View attachment 4187047
Thoughts?

Thanks!

Click to expand...

Some just turn red in flower. Might be magnesium def. Epsom salt is good for that.

If the plant isn't slowing down, i wouldn't worry about it..

I have some epsom salts, I just didnt want to overdo it, its my first real grow outside.

Thanks!

Jack Kilgore said:

I have some epsom salts, I just didnt want to overdo it, its my first real grow outside.

Thanks!

Click to expand...

Right on. If the leaf tips at the bottom of the plant are not curled up, your magnesium is probably fine and it's just normal red stems.