1Bring 5 cups of water to a boil in a medium saucepan over high heat, stir in the lavender and reduce heat to a simmer.
2Simmer for 15 minutes.
3Line a strainer with cheesecloth over a large mixing bowl.
4Remove from heat and strain lavender water.
5Return lavender water to the pan and add honey, stirring well.
7When cool add lime juice and give it a good stir.
8Taste, adjust sweetener and chill.
Place 8 blackberries and 1 teaspoon sugar into each tall glass. Muddle. Pour limeade mixture to fill each glass 2/3 full. Top each with 1 shot vodka and ice. Garnish with lavender sprig. Make more.