In a cocktail shaker, muddle the lemon juice and the thyme until fragrant. Add gin and sparkling lemonade, stir to combine.
In your cocktail glasses, put three blackberries at the bottom of each glass and muddle lightly then fill each glass to the top with crushed ice. The blackberry mixture should be at the bottom of the glass.
Using a strainer, equally pour the juice and gin mixture over the ice.
Garnish with a lemon peel, edible flowers, thyme, and/ or blackberries. Enjoy.