1. Potatoes

These are grown from tubers, which are thickened underground stems. New plants sprout from the "eyes," or buds, located on the surface of the potato.

2. Ferns

As non-flowering plants, ferns reproduce using microscopic, unicellular spores instead of seeds. These spores are typically found in clusters called sori on the underside of their leaves.

3. Strawberries

These plants spread primarily through runners (stolons)—horizontal stems that grow along the ground. New "daughter" plants form at the nodes where the runners touch the soil.

4. Ginger

This aromatic plant propagates through rhizomes, which are horizontal underground stems. A piece of the rhizome can be planted to grow an entirely new plant.

5. Onions

Onions grow from bulbs, which are underground storage organs made of layered fleshy scales. They can be cultivated by planting "onion sets," which are immature bulbs.

6. Garlic

Grows from individual cloves, which act as mini bulbs.

7. Mint

Spreads rapidly via runners (horizontal stems) or stem cuttings.