Lynn, my hubby went crazy with the pruning and almost killed my Ceanothus too! That is why the it is so woody underneath and I fear I only have one more season of it. But as long as it is flowering on top, it stays and after it goes am planting more its place. When the flowers die they create a layer of sparkly blue "snow" underneath. It's gorgeous.
Kate, my ceanothus never worried about frost and snow - we are under snow several times during winter up here. The type I have has very dark green and tough leaves. It's evergreen. See if you can find that one. You just need to keep the water up to it until it establishes and put it into rich but well draining soil to start it off.
Springcolor I am always on the hunt for hardy sedums. Not easy to find over here though. I would love to find a Sedum cauticola ‘Lidakense’ . Yes that's Lake Jindabyne and the Snow River. You're looking right at Mt. Kosciuszko.
Lynn here are closeups of the succulent. It propagates very fast from leaves or stems and creates aerial roots within days. It's cascading over boulders that are about 4ft high.