Syringa vulgaris 'President Lincoln'

Possibly the truest blue of any lilac, this French hybrid bears thyrses of single, medium blue flowers. It's a good grower that produces basal shoots readily. Rarely to never fed on by Japanese beetles.

 
Height:  8-10'
Spread:  8'
Shape:  Upright, rounded
Foliage Color:  Green
Exposure:  Full sun 
 
*Photo and info courtesy of Bailey Nurseries, Inc.