Purple stock and leaf stems P issue or genetics?

I noticed that there are purplish/red stalks and leaf stems on this gg#4 plant, and to some extent on my other gg#4s and blueberry plant, but other than that they seem healthy. Do you think this is a Phosphorous issue or due to genetics?

Im using advanced nutrients sensi bloom

genetics and / or LED lighting

I've seen this so many times before on indica plants, I lean towards genetics, regardless it has yet to have a negative impact on yeild or quality for me or anyone else I know who's encountered it

Yeah, my plants like to get purple stems. They don't seem to mind it.

I used to get paranoid about purple stems but if everything else in the grow is right and the plant is otherwise healthy, I tell myself it's just the genetics.

That is good to know, thanks! I have also definitely noticed interesting colours in flower using HLG LEDs

From this chart it says sulfur deficiency. I usually only get the purple in veg and fades away in flower.