In a large bowl, combine strawberries, blueberries, grapes, marshmallows, pecans, and coconut.
In a medium bowl, beat cream and sugar with a mixer at medium-high speed until stiff peaks form. Fold in sour cream. Add whipped cream mixture to berry mixture, gently stirring to combine. Cover and refrigerate for 30 minutes before serving. Stir well before serving.
Recipe by Taste of the South at https://tasteofthesouthmagazine.com/summer-marshmallow-salad/