Our Cornus has grown to 4 metres tall from 1 metre in about 5 years. It is a perfect layered shape and is positioned in the centre of a large lawn with full sun. It has no competition from other trees or shrubs. Every year we have enjoyed a prolific show of flowers, but this year nothing! We feed it every year in the spring and this year it has enjoyed another year of strong growth with full foliage with no die-back but, alas, no flowers. Other Wedding Cake trees in our area have enjoyed their normal spectacular flower show. Can you advise why no flowers this year?