The RHS have identified plants that are useful for pollinators and planting them in your garden will help to provide food plants for insects to thrive. This is what the RHS have done:
Wild bees and other pollinators are in decline. One way gardeners can help is by planting garden flowers that provide forage for a wide variety of pollinating insects
Using scientific evidence, our extensive experience and the records of gardeners and beekeepers, we've selected a range of year-round flowering Plants for Pollinators to tackle the decline in pollinator numbers.