I'm looking for something tall...aboout 4'-5', to form a border along the back of my shade garden. I would have to say that it gets dappled sunlight in spots (at best). The more colorful the better. Flowers aren't necessary but would be a bonus. I was thinking of maybe some type of grass but I don't know of any nice ones that tolerate shade. Maybe bushes of some sort? Thanks for any sugestions.