OK, so I do this every year. I am not an experienced gardener but learning more and more as I go along. I love my euphorbia mellifera - it's big and bushy and well-established. BUT the top of it was going all yellow and dried out, and the whole thing was bushing out at the sides, covering up my delicate jasmine bush which is next to it. I tried to trim it yesterday - and now it looks ridiculous. There's a big dip in the middle (lots of green leaves coming through) and I got too scared to do anymore. I think I actually do this every year and then leave it looking completely lop-sided and silly. What should I actually be doing with this plant? And should I just carry on cutting it? The stems are really long so when I cut down, it really takes a lot of. Thank you!!!