Common LilacÃÂ Syringa vulgaris Height:ÃÂ 11 feetSpread:ÃÂ 10 feetSunlight:ÃÂ full sun An old-fashioned homestead favorite, perfuming the air with fragrance in early spring from upright panicles of lilac-pink flowers; upright, bushy habit, quite leggy, suckers profusely, makes a great tall and dense hedge.