UKU: Sour Tsunami – 0.5g Vape Cartridge by Curaleaf. Sour Tsunami is a strain that became famous for being one of the first to be specifically bred for high CBD rather than THC content. The result is a strain that’s effective at treating pain and inflammation without producing a significant “high” that is linked to high THC. This sativa-dominant hybrid flowers within 9 weeks, producing dense, dark green buds with dark green and purple-tinged leaves. The buds have a familiar musky diesel smell with sweet undertones.