Does anyone know why?
Is it a new plant? or a seedling?. Sometimes the first year things do flower at a different or later time. It has also been a really cold spring this year and things are delayed . It will probably be fine next year when it's settled in.
its new to me
some of mine, possibly all descended from the same one (white) flowers whenever it feels like it. I bought the original in flower during the summer many years ago.
Mine still has flowers on it from very early spring but the seed pods are now flourishing.