I’ve been brainstorming plants to climb up my willow obelisk. My first thought was to do morning glories. After reading all your lovely comments and suggestions I’m now moving towards Clematis. I was flipping through the new Martha Stewart Living featuring a few clematis plants. The dark purple was gorgeous. Might be stunning against a gray house with pink and green plants surrounding it. The pink version combined with a rose on the right is pretty amazing too. A few more clematis inspiration shots below from White Flower Farm.