From Japanese digging knives to LED growing lights, tools and technology are transforming the way we garden. In this episode RHS experts share some unusual favourite gardening implements. We discuss how technology – from 19th century lawnmowers to 21st century sensors and apps – has changed and continues to change the face of gardening. Chelsea designer Hay Joung Hwang describes how she incorporates technology into her gardens. Paul Myers of Farm Urban explains how a zero-waste underground farm is bringing fresh year-round local food to the heart of Liverpool.