Dust off your gardening gloves and don your sunglasses, as we look to the skies on today’s show. We’ll be exploring the dizzying heights of a famously tall plant, the gunnera, with expert botanist James Armitage. We’ll also be taking on a high flying adventure with garden author Ben Dark into the world of trees. Plus, if you need a reminder on what to do in your garden or allotment this week, fan favourite Matthew Oliver is here to jog your memory.