Posted: 27/10/2014 at 19:55
I don't think I'd be too worried about it. Black Knight is foliage rich, it will flower, but in my experience (mostly of other peoples) they can be temperamental. Hebe's grown from cutting's take a while to get going anyway, but at 2ft it sounds fully grown. They like full sun and a free draining soil, so are the conditions right. I don't think it's one of the most heavily flowering hebe's either, it's more a foliage plant. Some Hebe's are flower mad, other's aren't. I tend to think having had a look about it's grown more for foliage than flower. It's a great foliage plant, maybe another variety would suit you better, it depends what your'e after.