In a blender, combine the sweet potato, milk, 2 dates, ginger, turmeric, cinnamon, and hemp hearts, if using. Blend until very smooth.
Taste the mixture, then blend in another date if more sweetness is desired. Once smooth, add in a heaping cup of ice cubes and blend until they are totally broken down. You can add more ice if you'd like a thicker shake, but keep in mind that more ice will dilute the overall flavor.