Monty Don offers advice on making the perfect herb garden and plants out some beautiful garden stalwarts in his cottage borders at Longmeadow. We meet Carrie Thomas in Swansea, who holds the National Collection of aquilegias, and celebrate all that this theatrical, delicate flower has to offer. And Carol Klein is with new gardeners Dan and Dominique, giving their veg patch a necessary kick-start. She helps them make the most of their new raised beds, and gives them tips on how to grow the tastiest root and salad crops.