Lilac Syringa Purple - Hardy plantA wealth of purple flowers The lilac (Syringa) is a popular ornamental shrub that grows to between 3 and 3. 5 metres tall. This striking shrub blooms in the spring with fragrant plumes of flowers resting between light green leaves. The plant is deciduous and winter hardy! Place the plant in a sunny spot and water it after planting. Pruning is not necessary unless the plant gets too big. For a garden full of fragrance and colour