Himalayan Balsam (Impatiens grandulifera)
I is for INVASIVE
So what is an invasive plant? It's a non-native species that competes with and replaces native plants in their natural habitat causing the natural vegetation to become endangered.
Although Himalayan Balsam is an annual, each plant produces an incredible about of seeds (approx. 800 per plant), eventually creating dense stands that prevent native plants from growing. Also, because Himalayan Balsam produces is a prolific producer of nectar, pollinators gravitate to them rather than to native species.
Purple Loosestrife (Lythrum salicaria)
Another plant that grows in dense stands, is Purple Loosestrife, which clogs irrigation canals and reduces the forage value of pastures.
St. Johnswort (Hypericum perforatum)
In addition to crowding out native species, St. Johnswort is toxic to livestock with light-coloured skin causing severe sunburn on normal sunny days.
I am linking to Jenny Matlock at Alphabe-Thursday HERE