Choisya Apple Blossom updates 2016
Unfortunately it may take a year or two for established plants to flower.
The plant in my garden produced so many flowers there was very little propagation material, so initially plants were grafted and under glass suitable material was produced to rise cuttings or use for tissue culture.
Plants in Garden Centres still look attractive with the very fine leaves, completely different to any other Choisya currently on the market.