Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large bowl, combine flour, sugar, baking powder, salt, and lemon zest.
Add cold butter to the dry ingredients.Using your hands, work the butter into the dry ingredients by squeezing it between your fingers. The goal is to flatten the butter pieces slightly while working them into the dry mixture. You should still have dime-sized pieces of butter in the flour. Mix in the chopped candied ginger.
In a small bowl, lightly beat the eggs, cream, ¼ cup lemon juice, and vanilla.
Pour the egg mixture into the flour mixture. Stir with a wooden spoon until just combined. Do not overmix. The dough will be soft and wet.
Turn the dough onto a well-floured surface. Sprinkle with flour and press into a rectangle. Fold the dough over itself and press into a rectangle again. Repeat once more, ending with a 1-inch thick rectangle.
Use a round cookie or biscuit cutter to cut the dough into 8 circles. Place them on the parchment paper lined baking sheet.
Brush the tops with an egg wash from one egg and a tablespoon of milk or water.
Bake for 12 minutes until light golden brown. Remove from oven and let cool.
Make Icing: Mix powdered sugar with 1 tablespoon of lemon juice until smooth.
Drizzle icing over the cooled scones and decorate with lemon peel or dried rose petals. Allow the icing to set before serving.