In a special programme, Gardeners' World comes from the first big flower show of the season, the RHS Malvern Spring Festival. Arit Anderson and Joe Swift explore show gardens packed full of ideas and discover the newest varieties of plants and flowers that are hot off the potting bench. We meet the nursery owners from Devon making their Malvern debut, hoping to inspire others with their pollinator-friendly display of peat-free perennials, and visit a houseplant specialist from Hertfordshire who has tips on how to revive, rather than replace, ailing plants. Rachel de Thame celebrates spring colour at Morton Hall in Worcestershire, a garden that has spent years perfecting the art of planting tulips to best effect.