A case of Jammu and Kashmir is one of the biodiversity hotspots in India including many endemic plant species. One of the threats to the biodiversity of the region is the invasion of alien species. The invasive alien species have naturally introduced into the area from the adjoining Punjab plains. The damage caused by the invasive alien species in terms of biodiversity loss and disruption of natural ecosystems outweighs their benefits. The invasive alien species present there are seriously affecting the biodiversity of the region. Most of the invasive alien weeds were found to marginalize the native species with the result native species either fail to germinate or cannot compete with the aggressive invaders. Some alien weeds exhibit allelopathic effects thereby preventing the growth and multiplication of native species. The alien weeds have also been found to exert serious negative impacts on the agriculture and animal husbandry by reducing the crop yields, escalating the cost of produce and marginalizing grasslands and pastures. The management of invasive weeds requires co-ordinated efforts to control and eradicate them so as to prevent further damage to the biodiversity.