I don't know what it is this year—perfect weather, plenty of rain, the planets aligning—but the garden looks spectacular. Even the grass looks great. Of course, if it stays 90 degrees like it's going to be today, it will probably dry out and I'll be complaining about that. But for now...perfect.
Rock Soapwort, a new favorite—kind of low-growing and creepy and looks really nice spilling over a stone wall.
A yellow Japanese tree peony. Like regular peonies but without the ants.
A mystery flower—I can't remember what this is called. (Thanks to Camilla and Patricia for identifying this as Verbascum chaxii and I believe it is the 'Bold Queen' variety. There's also one called 'Milkshake' with flowers that are pure white; mine are a bit yellower)
White rhododendrons—the wild kind—which are much prettier than the cultivated ones. This looks amazing when it's just starting to get dark—it glows.