Pocahontas is a great dark purple lilac. Bloomed for me the first spring after planting while still very small. Just gorgeous!
I bought several of my bushes from Select Plus International, a lilac nursery in Canada. They have the best selection I've found and lots of info on the different varieties. Google them for the web address. Great nursery.
"In all things of nature there is something of the marvelous." --Aristotle