Gardeners’ World

BBC2, 8pm

With midsummer approaching, Monty Don plants dahlias and cucumbers at Longmeadow. He also takes a look at plants that spill over to soften the hard edges of paths and borders. Also tonight, Carol Klein visits Trebah Garden in Cornwall, where she finds plants that can add early summer glamour to borders, and Nick Bailey looks for shrubs at RHS Wisley that can act as alternatives to box hedging. ★★★★★