With a long Easter weekend to look forward to, Monty Don is on hand with practical gardening advice and inspiration, including how to get potatoes in the ground if you fancy growing them. He'll also be sowing seeds for a colourful cut flower display, and starting a new project to show how easy and inexpensive it is to create topiary from yew cuttings. Ashley Edwards heads to a magical spring garden in Horsham to share his love of the season of renewal while, in Carmarthenshire, there's a grower who gave up her job in London to follow her dream of becoming a flower farmer