Herbal White Sangria

Ingredients

• 2/3 cup (150 ml) superfine granulated sugar
• 2/3 cup (150 ml) water
• 1 cup (225 ml) seedless green grapes
• 20 fresh thyme sprigs (preferably lemon thyme)
• 1/4 cup (60 ml) fresh lemon juice
• 2 tsp (10 ml) green cardamom pods* (about 25 per 2 tsp), crushed
• 2 750-ml bottles fruity white wine such as a dry Reisling
• Garnish: small (pesticide-free) edible flower blossoms such as Johnny-Jump-Ups or garden pea blossoms