We've been talking about the impact the rising cost of feed and gas is having across the food and farming sectors, and now the British Free Range Egg Producers Association say its’ recent survey of around 139 members found that 51% of those who answered are considering coming out of egg production. They say supermarkets need to charge 40p more per dozen eggs, to reflect higher costs. Home grown trees could become even more important to the country’s tree planting target as the government is to introduce new rules on sourcing trees. From June anyone getting a grant under the England Woodland Creation Offer or the Future Farming Tree Health Pilot can only get trees from approved suppliers, which some say could reduce pests. This week we're looking at growing undercover. We hear about the more unlikely crops being cultivated under glass - trees, olives and lemons. And we pay tribute to Lord Henry Plumb who died last week a the age of 97. Described as "farming’s greatest ever advocate", Lord Plumb was a founding member of the Young Farmers' Clubs, president of the National Farmers' Union in the 1970’s then MEP for the Cotswolds and President of the European Parliament. He also set up a foundation in his name which gives grants to help young people get rural businesses started. Presented by Charlotte Smith and produced for BBC Audio by Caitlin Hobbs