With spring just around the corner, Monty makes a start on his bog garden and demonstrates how to divide perennials and get plants for free. Rachel de Thame visits a garden in Kent, a labour of love where meticulous planning, discipline and precision have cleverly extended the season, and Arit Anderson plants up a seasonal container inspired by the colours of spring. We meet an allotmenteer in north-west London who loves to experiment with growing unusual and heritage vegetables to use in her cooking, and a couple of plantaholics with a passion for rare and unusual plants show us around their garden, created on the site of a former nursery in Cambridgeshire. Viewers also share their gardening exploits.