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Knotweeds Polygonum

The rated Polygonum records split: 1 fire-resistant, 1 keep-away, 0 in documented conflict. These counts describe the cited records — 2 records carrying 9 evidence rows from 8 cited sources; they do not make one verdict for the genus.

Fire-resistant

1 species

Silver fleece vine Fire-resistant Polygonum aubertii Limited evidence · 6 sources Zones 4–4

Keep away

1 species

Japanese knotweed Keep away Polygonum japonicum (Fallopia japonica) Limited evidence · 3 sources Zones 4–4

About knotweeds

Corpus context. Polygonum is the directory's #507 largest of 550 genus groups: 2 records carrying 9 evidence rows from 8 cited sources, recorded as vine, shrub , hardy across USDA zones 4–4. Those are corpus facts, not a whole-genus flammability claim.

More about Polygonum: Wikipedia — external references; not evidence sources.

Where rated knotweeds grow

Tagged as growing in 43 states.

See Polygonum on Grow → · JSON