That is really beautiful, the rings and beds.
I am surprised that my wife has not offered to take a week off and come over and help plant in your beds! :)
The bright yellow is Coreopsis, and I liked the dense growth habit and multitude of flower buds.
The beds look a little sparse right now, but I planted so that everything should touch slightly when it grows to size.
I'm going back later this afternoon for some more lilies and hostas. A bargain like that is hard to pass up. My husband is going to kill me. I am concentrating on the flower beds and neglecting the vegetable planting, but I am having so much fun with the flowers and veggies almost seem like work to me right now.