 It grows on rocky slopes and stream banks in mountains regions at elevations of 1600–2800 m.

"Allium plummerae" produces elongate bulbs up to 5 cm long but rarely more than 1.5 cm in diameter.Flowers are up to 10 mm across; tepals white or pink; anthers purple; pollen yellow.The epithet "plummerae" is in honor of one member of the expedition that collected those specimens, botanist Sara Plummer Lemmon.