Start by making a lavender simple syrup. Add 1 cup water, 1 cup sugar, and 3 tbsp of lavender into a small pot. Cook over medium heat until the sugar dissolves. Reduce the heat to low and let simmer for 10 minutes to infuse the lavender. Remove and let cool while you prepare your other ingredients.

Juice 4 lemons into a large pitcher.

Add the 6 cups of water and the optional pureed blueberries.

Using a strainer or cheesecloth, strain the lavender simple syrup into the lemonade so that the lavender pieces are left behind.

Add the ice, stir, and serve.