We planted a large lilac bush we bought from a garden centre late last summer. We bought a big one as we wanted something that was going to make amoney impact straight away. After planting we got new growth straight away and then this year it's flowered. However there doesn't seem to be any new growth coming through yet. Is this normal? It just looks bare. There are buds on the canes though so will these start growing now the flowers have bloomed and died off?