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Garden gnomes were statues of gnomes which some people used to decorate their gardens.
Ashenden offered a selection of approved garden gnomes. (AUDIO: Ashenden [+]Error: Code 2 - no data stored in variables, cache or SMW.)
K9 Mark III encountered a garden gnome in a greenhouse while pursuing George Tracey. (TV: A Girl's Best Friend [+]Terence Dudley, BBC1 (1981).)
Garden gnomes were sold at the florist's shop in which Fitz Kreiner worked. (PROSE: The Taint [+]Michael Collier, BBC Eighth Doctor Adventures (BBC Books, 1999).)
Peri Brown once found a garden gnome inside a potting shed on board the TARDIS. (PROSE: Superior Beings [+]Nick Walters, BBC Past Doctor Adventures (BBC Books, 2001).)
Clyde Langer, upon seeing the Gorgon's petrified victims in St Agnes Abbey, asked why they couldn't get garden gnomes like everyone else. (TV: Eye of the Gorgon [+]Phil Ford, The Sarah Jane Adventures series 1 (CBBC|CBBC]], 2007).)
After the Hornets departed Antonio's body, the Fourth Doctor took it to Nest Cottage, placed it in stasis, and used it as a garden gnome. (AUDIO: The Circus of Doom [+]Paul Magrs, Hornets' Nest (BBC Audio, 2009).) The Doctor showed the garden gnome to Mike Yates when he first visited the Doctor's house; he thought it was "wretched". (AUDIO: The Stuff of Nightmares [+]Paul Magrs, Hornets' Nest (BBC Audio, 2009).)
The Eleventh Doctor referred to the robot guardians of the gardens on planet Iros as "military garden gnomes", to which they took offence. (COMIC: Gnome Guard [+]Error: Code 2 - no data stored in variables, cache or SMW.)
Geoffrey Jennings stole garden gnomes from work and kept them in his garden. He later lost his job because of the stolen gnomes. (AUDIO: The Curious Incident of the Doctor in the Night-Time [+]Error: Code 2 - no data stored in variables, cache or SMW.)