Ginger is propagated by using its rhizomes.
Rhizomes are underground stems that grow horizontally and have nodes from which new roots and shoots develop. Ginger is a tropical plant that grows up to about 3 feet tall and produces a thick, knotty, and aromatic rhizome. This rhizome can be broken into smaller pieces, each with at least one bud, and then planted into soil.
The buds on the rhizomes will grow into new shoots, and the roots will grow down into the soil. As the plant grows, it will produce more rhizomes, which can be harvested and used for cooking, medicinal purposes, or for replanting. This process of breaking up and planting rhizomes is known as vegetative propagation.
While ginger can produce seeds, it is not commonly propagated this way as the seeds are sterile and do not produce viable offspring. Additionally, while bulbs and corms are also used for propagation in other plant species, they are not commonly used for ginger.