Allium ostrowskianum flower with showy 2" diameter rose-pink flower clusters. A super cold hardy wildflower Allium, it looks wonderful when interplanted into perennials and groundcovers. This Pink Allium (Sometimes known as Dwarf Persian Onion), is an easy and prolific blooming heirloom variety. Plant it in amongst ground covers like Veronica or Creeping Thyme. Plant 4" apart. 6-8" tall. Early Summer Blooming.