I am not a gardener but I know that the cats I feed and care for (even when they are timeshare cats) love pampas grass. The grass flowers in August in Britain. It looks nice, feels nice and creates a interesting place for cats to rest and play in.
I like this photo. The grass matches the whiskers. Is that significant? Both these tabbies liked to rest and interact in this long wispy grass.
Here is another picture. An excited classic tabby cat embedded in the pampas grass. You can see the movement in the blurred fur and grass. His ears are back indicating excitement in this instance.
My sentiments too. A lot of people like these long grasses as well as cats!