Not all “foreign” plants are invasive, but the ones that are... they’re a real problem. They displace native species, disrupting the balance of ecosystems. Hima

Not all “foreign” plants are invasive, but the ones that are... they’re a real problem. They displace native species, disrupting the balance of ecosystems. Himalayan Blackberry in the Pacific Northwest being a good example. It will choke an entire landscape, suppressing or murdering native species that didn’t evolve to fight that particular competition.