"Native vs Exotic? Why Diversity in the Garden is the Bee's Knees" prelim results from RHS' study 'Plants for Bugs' ... assumption that native plants are best for wildlife, but historically there's little scientific evidence to support this ... Results from study: pollinators are more likely to visit natives & plants from same hemisphere, but exotic plants help extend the seasons (spring & fall); Plus, +flowers=+more pollinators ... Photo: UK native flower - the Corncockle