Gardeners’ Corner heads to Glenarm Castle for the annual Tulip Festival. Presenter David Maxwell takes in the display with Reg Maxwell and speaks to gardener Jordan McWhirter, who planted some of the six thousand bulbs. David also catches up with celebrity gardener Sarah Raven and asks her what follows the tulips in her East Sussex garden. Also in the programme, organic vegetable grower Klaus Laitenberger on naked pumpkins and David’s expert guests Claire Woods and Averil Milligan give a masterclass in cuttings.