I only have a few Euphorbias in my garden, but one of my favourites is E. myrsinites because it's so pretty in all seasons. The foliage is beautiful on its own when nothing else is going on, but it puts on a stellar show all spring from blooms to seedpods to even the pink-flushed bracts after it releases the seedpods. To give an idea of how long these stages last, I've put the dates above each photo--all from 2012 and the same plant.