That is a wonderful plant for the space and very colorful.
New growth and old growth on two Euphorbias here.
I have this plant as avasmontana, the first 3 heads look like they might be waking up
Here are two of the branches that it produced over the summer and fall (now done growing for the season)
So that would be 2 disjunct growth spurts for different branches, kind of weird.
This is fruticosa, main stem and side branches:
Much more active below.