David Maxwell heads to Bundoran on St Patrick’s day where organic gardener Klaus Laitenberger is planting potatoes ‘Leitrim style’. He demonstrates his old Irish method of covering the seed potatoes with freshly dug turfs, showing how an area of lawn could easily provide a crop of spuds this season. Also on the programme, with seed sowing gathering pace in the garden, Amy Kelly explains why it makes sense to try heritage and heirloom varieties. They may have fallen out of favour with the supermarkets, but she says their taste, and the fact that you can save seed for next year, make them a good value choice. David visits Augher Central Primary School as part of the BBC’s ‘Little Green Fingers’ project. Teachers, pupils, volunteers there are transforming a neglected school garden into a wildlife haven and outdoor learning area. And how do you tell if that old packet of seeds at the back of the drawer is worth sowing?