There are many compelling reasons to grow native plants.
They are adapted to this [present] climate and will thrive where non-native plants may struggle. Other reasons – lower maintenance, less watering and, as we were recently reminded, native plants are hosts to native insects.
So another reason to go native is for the bugs – native insect fauna dine on the host plants that have evolved with them. Less native plants, less insects. While some might think this would be positive (less bugs!), it would result in a loss of biodiversity and a weakened food chain. Not a good thing.
Still not sure you’re ready to uproot your aliens and replant with natives? Read Bringing Nature Home by Douglas Talamy while listening to Pete Seeger’s “The People are Scratching” from his God Bless the Grass album!