Donald Wyman Lilac will grow to be about 10 feet tall at maturity, with a spread of 8 feet. It tends to be a little leggy, with a typical clearance of 3 feet from the ground, and is suitable for planting under power lines. Extend the Lilac season with this extremely hardy, late blooming variety. Purple buds and single, fragrant, pink-lilac flower clusters appear on new spring growth two weeks after common varieties. Useful in shrub borders, informal hedges and perennial borders.