Photo by Melody

PlantFiles: Bohemian Knotweed
Fallopia x bohemica

Family: Polygonaceae
Genus: Fallopia (fal-OH-pee-uh) (Info)
Species: x bohemica

One member has or wants this plant for trade.


6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)

10-12 ft. (3-3.6 m)

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)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade
Partial to Full Shade


Bloom Color:
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall


Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
This plant is suitable for growing indoors
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season
This plant is resistant to deer
Suitable for growing in containers

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings
From softwood cuttings
From seed; direct sow after last frost
By simple layering
By air layering
By tip layering
By serpentine layering

Seed Collecting:
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By giftgas
Thumbnail #1 of Fallopia x bohemica by giftgas


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive Invasive On Apr 19, 2009, Invasive from Jamestown, KY wrote:

This plant Is so perfect In so many ways. For one if you do want privacy and you want privacy in a hurry, there Is no other plant on this planet that could do It any faster then this one. It makes such beautiful flowers, all nice and white and the bright green foliage and leaves will cheer you up in no time. This Is God's answer to privacy. What you need to do Is plant this and when It starts putting out new shoots, simply dig one of those shoots up and give to a family member or friend and let them enjoy the beauty and privacy that this plant can give. Before you know It you will have a bunch of this plant to give all family and friends.

Also have you ever took a substance called Resveratrol? If so guess where It comes from? Thats right It comes from this plant MANY herb companies are using this plant especially for this purpose. It has been called the fountain of youth herb so once you see this plant do give It the credit It truly does deserve. People around the world everyday take Resveratrol I just wonder If they give thanks to the Creator of everything for creating such a truly amazing plant with great healing abilities and great value for being a privacy plant.

Folks this Is a winner all the way. Thank you God for creating this plant so we can enjoy and use It for the great plant that It Is.

Positive giftgas On Apr 17, 2009, giftgas from Everson, WA (Zone 7b) wrote:

A cross between Giant Knotweed, and Japanese Knotweed - It gains perfect flowers, which can produce seed, just like Giant Knotweed, and the speed and spreading ability of Japanese Knotweed.

Bohemian Knotweed will grow anywhere where the temperature is above freezing, and the plant is not fully submerged underwater. It will grow in any soil, and will spread via rhizomes up to 40' away from the parent plant.

There isn't a more aggressive, or invasive plant on earth.

Thus being said, there isn't a faster growing privacy screen than Bohemian Knotweed. Dig a trench, and fill it with me, it won't be able to punch through it.

Bohemian Knotweed has many other uses as well...

Do you have loud and disgusting neighbors that leave trash and garbage all over their yard? Have you done everything possible within the law to no avail? Do you have fantasies about planting kudzu, but you know that you can't, because the deer will eat it in seconds?

The answer is simple: After the last frost, put down a rhizome barrier (as for bamboo) then simply place several cutting in the middle of their yard next to their driveway. In no time at all, your problems will disappear (underneath a great smelling, good looking plant).

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