Fern Britton presents the fourth round of the competition, with six contestants remaining in the race to be crowned Britain's best amateur gardener. They must present Jim Buttress with perfectly uniform tomatoes, while Jonathan Moseley sets them the task of growing rudbeckia and incorporating them in a stacked flowerpot arrangement. For their final challenge they have to use their produce to make sweet and savoury jams for Thane Prince, before the three judges decide who will leave the competition.