As national governments try to reduce man’s impact on the planet at COP26, Gardeners’ Corner takes a look at what we can do in our own gardens. David Maxwell speaks to a compost manufacturer in Bellaghy about peat and the alternatives. He explores a woodland with Ian McCurley from the Woodland Trust and finds out the true value of planting thousands more trees. And David gets a crash course in turning household waste into plant food when he lifts the lid on Reg Maxwell’s wormery. All that and the experts will be answering listeners’ questions live. gardenerscorner@bbc.co.uk