Biodiversity encompasses plants, wildlife and ecosystems.  A diverse range of plants will attract a variety of insect pollinators, enabling an even wider range of wildlife to exist as predators, creating a multitude of ecosystems which enhance human life in turn.  These ecosystems don’t need to be large or officially recognised as ‘hotspots’ to be of value, allowing some ‘weeds’ to co-exist with cultivated garden plants can easily multiply the range of species advantageous to wildlife.  This in turn provides us with natural predators which reduce the need for introduced pest control and encourages the pollinators which are essential for most of our crops to bear fruit.