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Species · Flowering plants

Giant Knotweed

Reynoutria sachalinensis

220Records since 2000
JunePeak month
48Counties with records

When it is recorded

Jan0
Feb0
Mar1
Apr8
May22
Jun41
Jul27
Aug23
Sep15
Oct15
Nov1
Dec1

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Highland Scotland58
2Worcestershire England6
3Sefton England6
4Powys Wales6
5Mid and East Antrim Northern Ireland6
6Swansea Wales5
7Surrey England4
8Telford and Wrekin England4
9Midlothian Scotland4
10Norfolk England3
11Oxfordshire England3
12Aberdeenshire Scotland3
13Ards and North Down Northern Ireland3
14Cumbria England2
15Sheffield England2
57 England64 Scotland26 Wales3 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 48 counties in all.

About this species

Records since 2000
220
Peak month
June
Counties with records
48
Scientific name
Reynoutria sachalinensis
Group
Flowering plants
NBN Atlas records since 2000
979
Most recorded in
Highland
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Caryophyllales
Family
Polygonaceae
Genus
Reynoutria
Name with authority
Reynoutria sachalinensis (F.Schmidt) Nakai

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q28922301 · GBIF 2889088