I bought a Euphorbia Ascot Rainbow about 3 years ago after seeing it at the Seattle Garden Show, love the foliage. It's done great but this year every stem produced huge yellow blooms which are now top heavy and too garish so it's time to prune it. I normally cut flowing stems to the ground to be replaced with new stems but if I do that I'll cut off every one of them and if I cut flowers off some of them and cut others to the ground the plant will look misformed. What do you suggest?
Not sure what you mean. Since they've all bloomed are you suggesting I cut them all to the ground or just cut off the flower heads? And there are no new branches to leave for next year, if I cut all of them to the ground will new branches imerge?