Morfydd St. Clair wrote:Ceanothus will make a lovely blue hedge, and it comes in any hue from sky blue to deep indigo. In theory you can make a tea substitute from the leaves. I like the yellow of my cornus mas (cornelian cherry) which yields tasty cherry-like berries, but it blooms really early. One of my trees bears yellow fruit, not red, so if you get that + a late-blooming ceanothus you might even get the two colors at the same time.
Edited: Whoops, missed that you were looking for full-sized trees. Neither of the above will get much above 2 meters tall, sorry!