Rinse the woodruff leaves, shake dry and let wither overnight.
Thinly slice the lime and catch the juice. Mix half of the lemonade with the lime juice. Add the woodruff leaves. Chill for about 1 hour. After about 30 minutes, mash the mixture with a pestle. After the full hour, remove the mixture from the refrigerator. Remove the woodruff. Add the remaining lemonade and vodka. Pour the cocktail into glasses and top with lime. Add ice cubes. Serve garnished with woodruff leaves.