Gardening by the sea, Adam Frost's bulb of the month and celebrating 20 years of a garden trail

David Maxwell visits a unique, nature-friendly private garden in Falcarragh, created by gardener and author Seán Ó Gaoithín. Crammed full of native trees and plants, it has become a haven for insect and bird life, despite the sometimes harsh conditions on Donegal’s west coast. Further south, in Mountcharles, he visits Dorothy Jervis, whose cottage and garden overlook Donegal Bay. She is the fourth generation of her family to call this exposed hillside home. Despite heavy, wet soil and a plantation of Sitka spruce, she has created a relaxed, cottage-style garden that sits easily in the surrounding wild landscape. Also on the programme, Adam Frost chooses bluebells as his bulb for April, and Brendan Little joins David in the studio to answer questions. Contact the programme at gardenerscorner@bbc.co.uk