1. Dry it in the sun and preserve it to become old garlic.

2. When harvesting garlic, remove garlic heads that are too small, have rotten stems and leaves, are damaged, and are damp.

3. Spread on the open ground to dry in the sun until the stems and leaves become soft and yellow, and the skin of the garlic is dry.

4. After drying for about a week, let it air for the second time. Repeat this twice until all the garlic is dry.