At Longmeadow, Monty Don is celebrating the berries of the season and plants up potfuls of colour for spring. Frances Tophill meets the gardeners on an allotment site in Birmingham and harvests some unusual vegetables, while Adam Frost and Arit Anderson join forces to transform a front garden in Hampshire into a haven for the owners as well as wildlife. In Nottinghamshire, we meet an enthusiast who has amassed a collection of over one hundred varieties of rhubarb and in Scotland we find out why we should all grow herbs from a grower with over six hundred different types.