The Big Allotment Challenge is a British game show that has aired on BBC Two between 15 April 2014 and 17 February 2015. It is hosted by Fern Britton and is about gardening in Britain.

The three judges are Jim Buttress (for the "grow challenge", involving fruit and vegetables), Jonathan Moseley (for the "make challenge", involving flowers) and Thane Prince (for the "eat challenge", involving food).

The series was announced on 22 August 2013 by Janice Hadlow, the BBC Two controller. The gardeners have four months in Oxfordshire to grow their fruits and vegetables.

In Oxfordshire, nine pairs of gardeners competed in The Big Allotment Challenge 2014. Only one team could win and after each episode, one team left the series.

In Oxfordshire, nine gardeners competed in The Big Allotment Challenge 2015.

The winner was Rob Smith, a 35-year old from Sheffield, who works as a cabin crew member for Virgin Atlantic.