They will grow in almost any type of soil except the extremely acidic ones, but will love to grow in fertile, humus-rich, well-drained, neutral to alkaline soils. Lilacs don’t grow well in lowlands where water tends to collect for prolonged periods of time. Find a place in full sun for your lilac and mulch regularly. Fertilize them in early spring and again just after flowering with an all-purpose fertilizer, watered in well. They also need supplemental water during periods of drought.
Young and newly planted lilacs need to be dead-head before fruits and seeds form to preserve its energy for growth. If you want to propagate the lilac, sow seeds in containers in a cold frame as soon as they ripe or in spring. You can also take greenwood cuttings or layer in early summer, graft in winter or bud in midsummer.