Tops of leaf stems are purple....

So I have a girl and ever since flowering the tops of the leaf stems are purpleish in color. I've never seen anything like it. Anybody have any ideas? Plant seems healthy. MG organic soil and FF trio nutes.

teaching a class on this at this very moment in my grow thread

those leaves are sinks, the plant is storing nutes for later

they look good by the way

Beautiful plant

Thanks guys!

looks fine...