Here is another hydrangea that would be on my top 10 list. It is a compact grower, no taller than 3 feet and wide, with large, tight blooms. Most books say that the flower color is pale pink to violet but in our garden, it is a bright robin's egg blue. It is in a bed lined with bricks and sided by concrete steps. I don't know if that affects the bloom color but I suspect it does. The flowers have white centers in the early stag of blooming and the sepals are serrated.