In the first of four special programmes celebrating the joy that the gardening year brings, Monty harvests his favourite winter veg, demonstrates how to take hardwood cuttings and plants up a container with tulips for a display of spring colour.Joe Swift meets TV presenter AJ Odudu and discovers her passion for houseplants, Carol Klein visits RHS Rosemoor in Devon, a garden with enough colour and texture to brighten even the darkest of winter days, and Sue Kent and Toby Buckland take an inspirational trip to Piet Oudolf's garden at Hauser & Wirth in Somerset.The head gardener at West Dean Gardens in West Sussex shares his tips on growing ranunculus, and there's a look at an incredible collection of bamboo at Trebah Garden in Cornwall. There's also a chance to see what viewers have been getting up to in their gardens.