Combine frozen berries, ice, juice, rum, lime juice and 2 tbsp (30 mL) agave nectar to blender. Pulse until slushy.
Place remaining agave nectar on small flat plate. Dip rims of 4 daiquiri glasses in agave. Sprinkle rims with coconut, tipping out excess inside glasses. Pour daiquiri mixture into glasses. Garnish with lime rounds.
Alternatively, garnish with fresh cherries.