At Longmeadow, Monty Don makes space in the writing garden for plants that will flower later in the season and plants out tender vegetables for late summer harvests. Cameras revisit Frances Tophill's allotment to join her as she demonstrates an unusual method of reducing weeds and also catch up with a gardener in Wales who has dedicated years to breeding some very special varieties of rhododendrons. Plus, Joe Swift heads to Devon to find out about the design and planting challenges faced when creating a coastal garden.