Posted: 06/05/2016 at 11:01
I think that unless this is done in full knowledge of the downside it's got some difficulties. For instance I know a suburban verge that retains a lot of the wild vegetation from before it was a built-up area; so there are orchids, yellow rattle, ox-eye daisies, etc., which are more important for biodiversity than if they were replaced with garden plants, most of which are exotics. The native bluebell is becoming threatened by Spanish bluebells that hybridise and spread easily, primroses cross with primulas. Be very careful - pretty is nice, but it can be problematic.