Please don't forget to watch for frost now. If it's going to be around freezing, and clear and still, you may have frost. Cover your lilacs until the sun is on them!
We still have a nice assortment of deep purple lilacs available this spring.
Commonly referred to in the US as 'Ludwig Spaeth'. This and 'Nadezhda' are the lilacs I planted at the first house I owned on Long Island. Single deep reddish-purple. Mid-season. Grows 8-12' H x 6-8' W. Syringa vulgaris 'Andenken an Ludwig Spath'