> I think one should actually take a relatively hardline approach to planting only native plants. I disagree. Billions of birds fly around the world every yea

> I think one should actually take a relatively hardline approach to planting only native plants. I disagree. Billions of birds fly around the world every year with seeds in their gut. Plants are constantly, naturally, migrating in territory. "Native" plants are plants which were in a given place (in this example the US) before an arbitrary date (for the US, very roughly 1500), when we started keeping track of local flora. The climate is observably changing, and what was "native" in 1500 may not be applicable to a local ecosystem anymore. Trees are already suffering in some ranges, and ranges are moving north. Note that there is a difference between "non-native" (arbitrary) and "invasive" (measurable). Planting invasives (whether native or non-native) should be discouraged because they have the potential to disrupt ecosystems by completely filling niches. Planting non-invasive non-natives is harmless, and if well considered can be beneficial to your local ecosystem.