My understanding is that they aren't nearly as problematic as some other non-native plants though, like veldt grass, pampas grass, English ivy, sourgrass (Afric

My understanding is that they aren't nearly as problematic as some other non-native plants though, like veldt grass, pampas grass, English ivy, sourgrass (African wood-sorrel), ice plant, Himalayan blackberry, cotoneaster, periwinkle, etc.