August to late September is wild blackberry season in Campania and at my family’s home there are tons of them, you just need the patience to pick them because there are thorns all over the bush, but trust me it’s worth it. The amount of sugar added depends on the sweetness of the fruit. When you buy blackberries you’re expecting a deliciously sweet berry, unfortunately 95% of the time they’re sour, but that’s what added sugar is for. Quick tip: Frozen fruit is picked when it’s most ripe and flash frozen so more likely sweet.