Giant Fleeceflower (Koenigia alpina)

General Plant Information (Edit)
Plant Habit:	Herb/Forb
Life cycle:	Perennial
Sun Requirements:	Full Sun Full Sun to Partial Shade
Water Preferences:	Mesic
Minimum cold hardiness:	Zone 2 -45.6 °C (-50 °F) to -42.8 °C (-45°F)
Plant Height:	3-7 feet (90-210cm)
Leaves:	Deciduous
Flowers:	Showy Fragrant
Flower Color:	White
Bloom Size:	Under 1"
Flower Time:	Summer Late summer or early fall
Wildlife Attractant:	Bees
Propagation: Other methods:	Division
Pollinators:	Various insects
Miscellaneous:	Goes Dormant

Common names

Giant Fleeceflower
Knotweed
White Fleece Flower
White Dragon
Alpine Knotweed

Botanical names

Accepted: Koenigia alpina
Synonym: Polygonum alpinum
Synonym: Aconogonon alpinum
Synonym: Polygonum polymorphum
Synonym: Polygonum dshawachischwilii
Synonym: Persicaria alpina

Also sold as:

Persicaria polymorpha

Photo Gallery

Location: My garden in N E Pa.
Date: 2022-05-30

Uploaded by treehugger

Location: My garden, aged blooms
Date: 2018-08-07

Uploaded by Calif_Sue

Location: Wynyard Hall garden, UK
Date: 2023-06-21

Uploaded by kniphofia

Uploaded by kniphofia

Location: My garden zone 5
Date: 2018-06-08

Uploaded by gardengus

Location: My garden, Calgary, Alberta, Canada; zone 3.
Date: 2013-07-03

Uploaded by growitall

Location: Newby Hall, Yorkshire UK
Date: 2018-09-01

Uploaded by kniphofia

Uploaded by rcn48

Uploaded by Calif_Sue

Uploaded by 4susiesjoy

Location: Bide A Wee cottage garden, Northumberland, UK
Date: 2016-05-25

Uploaded by kniphofia

Location: My garden in N E Pa.
Date: 2014-05-30

Uploaded by treehugger

Location: Royal Botanical Gardens, Burlington, ON, Canada
Date: 2014-06-05

Uploaded by Anne

Uploaded by Calif_Sue

Location: Plymouth Nursery, Plymouth, MI
Date: 2010-05-27

Uploaded by DaylilySLP

Location: Bide A Wee cottage garden, Northumberland, UK
Date: 2013-07-17

Uploaded by kniphofia

Location: Ontario, Canada
Date: 2014-08-12

Uploaded by Daylilybaby

Location: At the Missouri Botanical Garden in Saint Louis
Date: 05-27-2001
Giant Fleeceflower (Koenigia alpina) 001

Uploaded by jathton

Location: At the Missouri Botanical Garden in Saint Louis
Date: 05-27-2001
Giant Fleeceflower (Koenigia alpina) 002

Uploaded by jathton

Location: At the Missouri Botanical Garden in Saint Louis
Date: 05-27-2001
Giant Fleeceflower (Koenigia alpina) 003

Uploaded by jathton

Location: At the Missouri Botanical Garden in Saint Louis
Date: 05-27-2001
Giant Fleeceflower (Koenigia alpina) 004

Uploaded by jathton

Uploaded by vic

Uploaded by Calif_Sue

Location: Ontario, Canada
Date: 2015-06-17

Uploaded by Daylilybaby

Uploaded by Daylilybaby

Location: Bide A Wee cottage garden, Northumberland, UK
Date: 2016-06-08

Uploaded by kniphofia

Uploaded by kniphofia

Location: Farmer John's Greenhouse, Farmington Hills, MI
Date: 2010-04-29

Uploaded by DaylilySLP

Uploaded by DaylilySLP

Location: Telly's Greenhouse, Troy, MI
Date: 2009-09-03

Uploaded by DaylilySLP

Location: Bogie Lake Greenhouse, White Lake, MI
Date: 2013-07-06

Uploaded by DaylilySLP

Location: Ontario, Canada
Date: 2014-08-26

Uploaded by Daylilybaby

Location: Ontario, Canada
Date: 2015-06-09

Uploaded by Daylilybaby

Photo Courtesy of Lazy S'S Farm Nursery.

Uploaded by Joy

Location: Allentown, Pennsylvania
Date: 2015-06-06

Uploaded by plantrob

Location: My garden in N E Pa.
Date: 2015-05-29

Uploaded by treehugger

Location: my brother's garden, Vichte, Belgium
Date: 2012-07-22

Uploaded by bonitin

This plant is tagged in:

Comments:

Posted by treehugger (Hanover Twp, PA - Zone 6a) on Mar 3, 2017 7:21 PM concerning plant:

This is a clump forming plant not the invasive plant. I have been growing it for 7 years now and it hasn't moved or seeded around. It has a long bloom period, It is a great back of the border plant or can be used as an architectural plant.

Reply to this comment
Posted by brightwork (Maine) on Dec 29, 2016 6:35 AM concerning plant:

I have a question about this plant. I cannot find it in the American Horticultural Society "A--Z" Garden Plants encyclopedia under any of its names. My wife suggests that this is because this is not considered a "garden plant," but rather an invasive weed. Can anyone comment on whether or not this is a desirable "shrub" for a garden setting? Thanks.

2 replies

Plant Events from our members
christine2	On May 1, 2008	Obtained plant

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Koenigia Giant Fleeceflower (Koenigia alpina)

Koenigia
Giant Fleeceflower (Koenigia alpina)