With the summer garden in full swing, Monty shows how to stake dahlias, sows seeds of perennials and celebrates an abundant vegetable harvest.The team meet a landscape designer in Cornwall who creates gardens that are not only sustainable but also beautiful and edible and go to Wales to meet a gardener whose garden reflects memories of her childhood home in Jamaica.There is a second chance to see Carol Klein visit Aberglasney Gardens in Carmarthenshire to look at their stunning collection of summer flowering thalictrum, and Mark Lane shows the adaptive tools he uses for planting and weeding in his garden in Kent.