A year or 2 ago, Gardeners' World (BBC), with Monty Don, went through a pleasing pro-native phase but, with a new head presenter, sadly they've gone back to a pro-exotica stance. Hence, this reminder...

"Green/eco-friendly gardening is native gardening, and vegetables, plus other consumables, should be the only exotic-flora we plant - as doing so can help limit food-miles, etc. By filling our other garden spaces with natives, we use less water and other resources, whilst aiding the native-fauna that, over the centuries, evolved with them. (Even high-nectar exotics, such as Buddleia, that are very attractive to SOME native-fauna, should be avoided, because they upset nature's/God's balance – God created evolution, too, that is.)

Our green gardens, with their vegies and natives, can be made still greener by the addition of compost heaps/bins; a wildlife pond – for native frogs, newts, and so on, rather than exotic goldfish; bee- and bird-boxes, plus carefully- selected feeders; rain- and grey-water vats; by growing everything organically - including thrifty home-propagation plus species-swapping; and by leaving some lush untidy patches, decaying branches, etc." (from here).