Preheat oven to 400°F and line muffin pan with paper liners.
In a medium bowl, mix together the flour, baking soda, salt, sugar, and hemp hearts.
Zest and juice the orange into a measuring cup. Add plant-based milk to bring the total liquid to 1 cup. Add the freshly grated ginger.
In a large mixing bowl, combine orange juice and milk mixture, coconut oil, vinegar, and vanilla extract. Mix well. Add the flour mixture and stir until ingredients are just blended. Without over mixing, fold in the orange pieces using a rubber spatula.
Fill muffin cups about ¾ full. Bake for 18 to 20 minutes, until muffins are lightly browned and a toothpick or skewer inserted into the center comes out clean. Cool on a wire rack.