Despite its intriguing appearance, Japanese Hops are highly invasive. These nasty plants can easily be mixed with Common Hops, their close relative, used for beer production.
Commonly known as Japanese Hops, Humulus japonicus are herbaceous annual vines that can quickly invade your garden. If not controlled, these vines can reach 35 feet (10 m) in height in a single spring-summer growing season. The plant spares its vines densely, covering the ground with a thick mat that can reach several feet deep. Its foliage is deep green in color and has a hairy structure. The leaves have 5-7 lobes with serrated edges. Commonly to the Cannabaceae family, Japanese Hops separate into male and female plants that bloom in mid-summer and produce seeds afterward.