The Preston lilacs bloom 2 weeks later than common lilac (S. vulgaris) and are often said to be one zone hardier (to Z2, though Dirr does...Read More not agree). They may be useful in Z2, and for extending the lilac season in a lilac collection.
However, the fragrance is quite unlike that of common lilac, and to my nose much less pleasant, more like privet.
Healthy leaf color is dark green. Plants with yellowish foliage have a health problem.
These hybrid lilacs originated in crosses between S. villosa and S. reflexa. They are not descended from common lilac (S. vulgaris), and have a different fragrance.
The Preston lilacs bloom 2 weeks later than common lilac (S. vulgaris) and are often said to be one zone hardier (to Z2, though Dirr does...Read More