Society garlic can be propagated by division or by seed. Division is the best method and involves separating a clump of the plant into smaller sections.
Division
Dig up the clump: In late fall or early winter, dig up a clump of society garlic after it has finished flowering.
Separate the clump: Use a sharp spade or knife to cut the clump in half, or into smaller sections. Each new section should have some of the root system.
Trim the foliage: Cut off the top half of the foliage on the removed section.
Plant the sections: Plant the sections in well-drained soil, at the same depth they were originally. Water them well.
Repeat: You can divide the plant every two or three years.
Seed
Collect the seeds: After the flowers dry out, collect the seeds from the plant.
Plant the seeds: Plant the seeds in the ground, covering them with no more than 1/4 inch of fine soil.
Water the seeds: Keep the seeds moist.
You can use garden gloves, pruning shears, a shovel, and a watering can to propagate society garlic.