Hi Debbie, I've had both Bonfire and Purpurea (lost one) for 2 years. Both are doing OK. Nothing to shake a stick at. Ascot Rainbow is doing fine but needs cutting back now. Nice winter color. I tried Blackbird several years ago but no go. I just love these things, especially the form of HB and AR.
Your photos are amazing!
Wait, did you you write an article about shrubby euphorbia a few years ago? If so you're to blame.