Where to Plant
Plant lilacs in a sunny location, larger growing varieties are well suited for specimen or accent planting, hedging, or screening in open areas where they have ample room to grow. Low growing and dwarf types are perfect for planting in smaller gardens where space is limited. Lilacs are beautiful companion plants for flowering shrubs and trees, bulbs, perennials and conifers.
Soil Requirements
For healthy vigorous plants and abundant bloom it is essential that lilacs be planted in good soil. Plant lilacs in loose, gravelly loam, with plenty of organic matter. Lilacs will not grow in compacted soil. Good drainage is a must. Add a couple of handfuls of lime at planting time and every three years or so thereafter, as lilacs are one of the few plants that do not like our acidic New England soil.
Pruning
Prune immediately after flowering to control size and shape, and to encourage new growth. Remove 1/3 of the oldest, heaviest wood each year by cutting it off at the base of the plant. Old lilac blooms are cut just above the forming buds for next year's blooms.
Fertilizing
Most lilacs will benefit from a light application of general purpose fertilizer as soon as the ground thaws in early spring.