And the white flowers are all what is known as 'pin eyed'. The other type of primrose flower is called 'thrum eyed'. Pin eyed becasue if you look at the middle of the flower you can see a pin head. In the other the centre of the flower is hollow. They actually need both types of flower for seeds to be formed by the way. The primrose is on the way to becoming single sexed with male flowers on one plant and female on another.
I didnt' realize they would get that big and lush. Very pretty. I've only seen the little potted variety that is sold in the Spring, more like temporary houseplants.