Growing mangos
Mangos are notoriously difficult to grow in non-tropical climates -- Kew Gardens has managed one fruit in twenty years -- but nevertheless I took five scraped pips and planted them above and slightly below the surface of a compost/manure mix. They were then covered with cling film and left in the warm. After approximately four weeks one of the pips planted beneath the soil sprouted.
And it grew to a good 30cm over the next six months, but ultimately withered and died as the temperature dropped.