‘Most breathtaking’ plants you ‘need’ in your garden - ‘extremely robust and easy to grow’

After what feels like a year of winter peering out onto a drab and dull garden, many gardeners will be raring to embrace the beauty and warmth that spring and summer bring back to their outdoor spaces. With this in mind, a gardening expert has shared five "must-have" plants every gardener "needs" in their backyard.