Identification of Japanese Knotweed

SPRING GROWING SEASON

Japanese Knotweed early Season
The Start of Spring begins with the Knotweed shoots beginning to appear very similar in appearance to Asparagus spears with a red-dy purple colour. Next Fast growing canes with leaves that unravel as the plant turns green. By Late spring the canes of the Japanese Knotweed can reach 3 metres (10 feet) in height .The hollow Bamboo with a pattern of purple speckles and the leaves recognizable with a distinctive zigzag pattern of the stems.

SUMMER GROWING SEASON

The Plants in the summer season have now grown to a height of approx 2-3 metres with a very dense cluster of bamboo stems with a lot of foliage. The Stems which are green with Red specks in colour are of a bamboo like appearance and if broken you will find them hollow inside.

As well as the leaves having a distinctive zigzag pattern on the stems they also have a distinctive heart shape with a pointed tip and a straightened edge. Also this plant will produce its tiny white flowers between the months of August and October.

Japanese Knotweed Early Summer Japanese Knotweed Appearance Early Summer

AUTUMN GROWING SEASON

Japanese Knotweed Late Summer
Dense cluster of bamboo stems with a lot of foliage. The plants have reached a height of approx 2-3 meters with leafs of a yellow colour and a wilting appearance. The Hollow bamboo like stems are now beginning to turn to a darker brown colour with the leaves a distinctive heart shape with a pointed tip and a straightened edge with the same remaining Zigzag pattern on the stems.

WINTER SEASON

In the winter months the Canes that are darkish brown in colour and brittle or more likely collapsing at this time of the season. Underneath the decomposing foliage next year, shoots prepare themselves for the following summer.

Japanese Knotweed in the Winter Japanese Knotweed Winter

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