Hosted by Fern Britton, the fourth round continues the search to find Britain's best growers. Having reached the half way point, six pairs remain ready to battle it out to harvest prizewinning fruit, vegetables and flowers ready for the show bench.

For the first time in the competition Jim Buttress sets them the tricky task of growing in the greenhouse, he wants to see a faultless aubergine on the show bench. The specimen flower continues to test the gardeners and Jonathan Moseley sets the challenge of making a topiary tree. Finally, preserves expert Thane Prince is expecting to taste prizewinning pickle and piccalillis on the show bench.

Which pair will continue to triumph and who will fail to blossom and leave the allotment for good? Show less