Posted: 10/05/2017 at 11:12
My feeling is that it's irrelevant. There are plants suitable for every type of soil, choose those suitable for what you've got. Gardening for wildlife is more about leaving things alone that making huge changes.
I'm sure you've considered this but many people are planting flowers for insects but not food plants for the larvae. Most of them are native plants, and 'weeds' in the eyes of many gardeners
Good luck, I hope it goes well