Monty Don shows what to do now to maximise next year's soft fruit crop by pruning his summer raspberries and planting on the strawberry runners he potted up a few weeks ago. As Monty harvests September's abundance in the vegetable garden he makes notes of the tastiest varieties he has grown this year which he would grow again next year, as well as sowing some quick growing crops to harvest in the autumn. At Glebe Cottage, some of the mainstays of the late summer garden are from South Africa and Carol Klein is propagating them by sowing agapanthus seeds and demonstrating an unusual method of increasing eucomis. And Rachel de Thame visits the renowned historian Sir Roy Strong at his own garden, The Laskett, and talks to him about its creation over the last 40 years, while getting a privileged look at his extraordinary archive.