Hi Cathya, most ceanothus need pruning in March and they generally respond very well indeed! However, if you pruned it in the Autumn, like many people tend to, it will take a while to come to a flowering condition. If it was hit by the frost during the period after pruning it may have been damaged and this may cause an irreversible stunting. Give it one more year and see what happens and if you do buy another be sure to prune it in March- just before it starts developing it's flowers. This also goes for most hydrangeas and other flowering plants that flower on 'annual' growth.