The Olympic Park Great British Garden competition, , has two categories - 16 and under, and over-17.
The winners from each category will then work with the team creating the London 2012 parklands to design a Great British Garden that will be in bloom during the Games and remain long after 2012.
"The final shortlist reflects the traditions and quirks of British gardens, from Tudor roses to garden gnomes, but they are all very different designs. I can't wait to see what the British public decide," said Olympics minister Tessa Jowell.
The Oympic Park will be one of many venues staging public events in the lead-up to and during the 2012 Games.
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