These summer flowering and low foliaged alliums (like A. angulosum) have really come into their own in the past dry summers, they flower for ages and stay tidy and neat. These are from northern Asia with pale lilac flowers over clump forming foliage through the summer - 12” (30cm).
Planting instructions
Best in sunny well drained soils in the sun. Plant 1.5" deep just to anchor them in, watering if dry, about 4" apart.