Japanese Hops

Humulusjaponicus

Genus
Humulus (HUM-uh-lus)
Species
japonicus (juh-PON-ih-kus)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Deciduous
Height
6-8 ft. (1.8-2.4 m)
Spacing
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
Hardiness
Danger
Handling plant may cause skin irritation or allergic reaction
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Chartreuse (yellow-green)
Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall
Other Details
Category
Annuals
Vines and Climbers
Water Requirements
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Direct sow as soon as the ground can be worked
From seed; direct sow after last frost
From seed; germinate in a damp paper towel
Seed Collecting
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Cole Camp, Missouri

Sedalia, Missouri

Downingtown, Pennsylvania

Puyallup, Washington

Featured Videos

Gardener's Notes:

0
positive
0
neutral
3
negatives
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R
Downingtown, PA | June 2015 | negative

This is a horrible invasive plant that gets all over the place and grows all over other plants and structures. It is very sticky to touch...Read More

C
ROSLINDALE, MA | February 2014 | negative

Two states have banned the trade, transport, or planting of this species due to its invasiveness.

A different species, H. ...Read More

C
Benton County, MO (Zone 5a) | January 2009 | negative

This plant is an alien and can be invasive. I particularly do not like this plant due to the firey red welts it causes on my skin from a...Read More

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