This spring, the youth theatre will perform the charming, upbeat musical adaptation of a literary classic, “The Secret Garden.” Misselthwaite Manor turns out to be a gloomy fortress. Her uncle is rarely home and his young son, Colin, never leaves his room, convinced he’s an incurable invalid. Mary discovers a strange walled garden that has been locked up for years. With the help of the gardener’s apprentice, Dickon, a lad who can talk to the animals, Mary coaxes the garden back to life. The garden seems to have a wonderful, magical effect on all who come into it, allowing Mary to help restore Colin to health and a reunion with his father.