Webb expressed surprise a couple weeks ago that I had allium blooming in one of my troughs. I always think of them as a spring plant too, but have found a few good summer bloomers in the allium family. Above is garlic chives, allium tuberosum. It's perfectly happy in a whiskey barrel on the hellstrip by the street.
Allium senescens var. glaucum, the circle onion (its leaves grow in a swirl).
The circle onion at home in its trough, with gentian, sedum, a chamaecyparis and so on. That's carex glauca in the trough behind, mimicking the alliums' foliage color.