Hi , I've noticed that the first set of flowers were normal in size on the first bloom, but the folowing are not the same , meaning that they are smaller , half the size of the previous flowers.

Why is that , too much heat , less water , too much water , less/more fertilizer, maybe I should skip fertilizing the tree in this period.

The tree is grafted on a trifoliata but I have noticed that happening to a cutting also , Meyer as well.

Thanks