I have some Euphorbia that I planted last year: the regular E. characias, that I see everywhere, and some cute little E. Dean's Hybrid, that I bought at Heather Farms Garden in Walnut Creek.
After they finished blooming, I cut off the flowers and the plants are doing OK, but E. characias looks pretty forlorn right now, and E. Dean's Hybrid has many tiny shoots at soil level while the old shoots are completely dead-looking. How do I encourage more shoots to come up? Do I prune out the dead-looking shoots on E. Dean's Hybrid? These plants look great near my purple Berberis, and I want to make sure they are as healthy as possible.