Grown commercially for harvest of female fruits, which are used by breweries to preserve and flavor beer. It is also an easy-to-grow ornamental plant that can be grown on a variety of support structures. This vine is native to Europe, southwestern Asia and North America. Hops grown commercially in the U.S. are the European variety, which has now escaped cultivation and naturalized in many areas. Hops grow rapidly each year, but will die back to the ground in winter. Yellow-green male flowers bloom in catkins. Female flowers and subsequent seeds are born in cone-like structures (strobiles) which mature in late summer to early fall. Strobiles are typically collected in September-October, with the seeds dried for use in the manufacture of beer. Flowers emit a pine-like fragrance, and are attractive to butterflies. Zone 4-8.