We recommend ordering a minimum of 2 rhizomes per variety. Rhizomes are cuttings from the underground stems of female hop plants. Planted rhizomes will take root so you can grow your own hops. Hops are perennial plants that spend winters dormant underground before sending up new shoots each spring which can climb from 10 to 30 feet through the early summer, yielding sticky ripe green aromatic flowers in the late summer. The flowers are used fresh for immediate brewing, or dried, vacuum-sealed, and cold stored for later use.