I've had similar luck with Erysimum in the past, they look fabulous in cooler weather, then sulk during our hot, dry summers, but they usually perk up again in the fall. Although 2 of the 3 followed this prescribed course of action, one of them is looking decidedly the worse for wear. I'm not sure if it got too much moisture, not enough, etc. One other bonus for the Erysimum is that they are pretty much evergreen and start blooming in March or April, way sooner than most plants in my garden. Now I'm faced with a decision, do I yank it out and replace it with another Erysimum, do I adopt a wait-and-see attitude to see if it recovers, or do I replace it with something else entirely?
In all honesty, while I love Erysimum, they are fairly short-lived, at least for me. They seem to bloom insanely for a year or so, but end up blooming themselves to death, leaving me with the bi-annual task of replanting them. I'm also somewhat bad at pulling the plug. I have a tendency to keep nursing plants along far beyond what I should, only to be discouraged at a plant that denies me the satisfaction of recovery. I haven't seen them in nurseries at all this spring, which may solve the problem for me right there...has anyone had luck propagating these puppies?
Argh! What should I do????