Preheat your oven to 350°F (175°C). Grease and flour a 9x5-inch loaf pan.
In a medium bowl, whisk together flour, baking powder, baking soda, salt, dried lavender, and lemon zest.
In a large bowl, cream together softened butter and granulated sugar until light and fluffy.
Beat in eggs, one at a time, then stir in Greek yogurt, lemon juice, and vanilla extract until well combined.
Gradually add the dry ingredients into the wet ingredients, mixing until just combined.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 45-50 minutes, or until a toothpick inserted into the center comes out clean.
Allow the loaf to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely.