How to Propagate rosy-flowered garlic?
Propagate by seed, or bulbils, or division of clumps in spring or autumn. See bulb propagation

rosy-flowered garlic · Allium roseum
Also known as: rosy garlic
Grow in full sun and fertile well-drained soil. It is best to grow in containers where garden soil is heavy clay and prone to saturation over winter. See allium cultivation
Propagate by seed, or bulbils, or division of clumps in spring or autumn. See bulb propagation