At Longmeadow, Monty Don checks the progress of the potatoes he planted earlier in the year and recommends plants for dry shade under trees. There are water-saving tips from a water scientist in Somerset who uses a variety of techniques to save as much water as possible in her own garden and advice from a head gardener in Dorset, dedicated to growing plants for their aromatic properties both in leaf and flower. Plus, Nick Bailey on summer-flowering clematis and Arit Anderson meeting people planting up the Birmingham canal sides.