Gardeners' Corner visits Rathlin, Rowallane and Islandmagee

In Gardeners' Corner this week the challenges of gardening on Rathlin Island, early spring colour in the garden and the benefits of growing plants in a polytunnel, how to grow the herb rosemary and a visit to Bangor walled garden. That's Gardeners' Corner this Saturday morning here on BBC Radio Ulster and on BBC Sounds.