Photo by Melody

PlantFiles: Japanese Knotweed, False Bamboo, Mexican Bamboo
Fallopia japonica 'Compacta'

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Family: Polygonaceae
Genus: Fallopia (fal-OH-pee-uh) (Info)
Species: japonica (juh-PON-ih-kuh) (Info)
Cultivar: Compacta

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One member has or wants this plant for trade.

Category:
Perennials

Height:
36-48 in. (90-120 cm)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:
Full Sun

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Late Summer/Early Fall

Foliage:
Herbaceous
Smooth-Textured

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)

Patent Information:
Non-patented

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry

Click thumbnail
to view:

By giftgas
Thumbnail #1 of Fallopia japonica by giftgas

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive giftgas On May 5, 2009, giftgas from Everson, WA (Zone 7b) wrote:

For those of you that don't like invasive plants, but want to grow one just for the experience, I would recommend this plant. It only gets 3' high, and has fantastic red flowers.

If you feed it well with Epsom salts, you will be rewarded with healthy looking leaves of the deepest green.

This plant is supposed to die back after the first frost, but I've seen it live in snow for up to a month.

The deepest rhizome that I ever found was about 5' deep, so if you want, the "Bucket Method" will work for this plant with no issues.



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