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Invasive Weeds - Himalayan Balsam

The Weed
Himalayan balsam or Indian balsam (Impatiens glandulifera) was introduced into Britain in 1839 and at a height of up to 3 m’s is identified as the country’s tallest plant.

The plant grows in dense stands with pinkish-red, hollow and jointed stems and shiny dark-green leaves that are lance-shaped with serrated edges. The characteristic, slipper-like shaped flowers are purplish-pink and appear in June. When the seed-pods mature they burst when touched and scatter their seed up to a distance of 7 m’s.

Click to enlarge


The Problem
Due to the vigorous nature of its growth, Himalayan balsam rapidly colonises river-banks and areas of damp ground. The plant dominates and smothers all other plants within its vicinity. In autumn, the plant dies back leaving banks bare of vegetation and liable to erosion.

The Solution
Control measures should be applied in early spring when the when the plant is actively growing. The aim will be to prevent flowering and herbicide treatments are most effective when carried out before June.

Where spraying is not appropriate of practical, cutting, mowing or strimming on a regular basis for about three years will be effective and may eradicate the plant altogether.

Call S H Goss for further details regarding identification, control and disposal.

 
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