The first big gardening weekend of the year gets underway with Monty dividing perennials and giving plenty of tips for how we can kick-start the garden for the season ahead. As millions of bedding plants are poised for planting in our pots and borders, Joe Swift visits a major grower to find out how they are produced and what drives the demand. Rachel is at a garden centre to find the top plant trends this Easter, and we travel to Devon to get some expert advice on looking after orchids from specialist grower Sara Rittershaus