So, we just got finished watching an episode of "James May's Toy Stories". We learned a lot about plasticine, but mostly we learned that a lot of people who are super serious about gardening are kind of mean.
The "real" gardeners came to make fun of James May (and some were downright insulting) and his plasticine (modeling clay to us Americans) flowers. Apparently, he was being "low-class", "vulgar", and "tarnishing the repuation of the horticultural community". Never mind that the majority of the flowers were made by hardworking British people, including veterans of the British army. The garden was beautiful, cheerful, and probably the closest many Britons would get to showcase in the Chelsea flower show.
Initially, the judges looked down their noses at May's work of art, but then had to scramble to throw some praise his way when the plasticine garden was clearly the public's favorite.
Personally, I think the detractors were not worried about the horticulturalists reputation as much as they were jealous.