Common knapweed
The tightly packed, thistle-like purple flower heads of common knapweed bloom on all kinds of grasslands. Also regularly called 'black knapweed, this plant attracts clouds of butterflies.
The tightly packed, thistle-like purple flower heads of common knapweed bloom on all kinds of grasslands. Also regularly called 'black knapweed, this plant attracts clouds of butterflies.
The ragged-edged, purple flower heads of Greater knapweed bloom on sunny chalk grasslands and clifftops, and along woodland rides. They attract clouds of butterflies.
Mae cofnodi rhywogaethau ymledol a welwyd yn hanfodol er mwyn ein galluogi ni i gydlynu’r rheolaeth a mynd i'r afael â rhywogaethau ymledol yn strategol.
Introduced from Japan in the 19th century, Japanese knotweed is now an invasive non-native plant of many riverbanks, waste grounds and roadside verges, where it prevents native species from…
Reporting sightings of invasive species and management efforts is essential to allow us to strategically tackle invasive species.
Did you miss our TV feature on 'Garddio a Mwy' earlier this month? Don't worry! Find the clip and more information on how gardeners can help stop the spread of invasive species…
Two communities working together to remove the invasive non-native species Japanese knotweed from the Afon Eitha.