Also known simply as Blue Diesel, Blue City Diesel is a highly potent mix of Blueberry and NYC Diesel. It's an indica-dominant hybrid (40:60 sativa/indica ratio), but it delivers both mind and body effects. THC levels have been known to exceed 23%, making this one of the strongest strains available for patients in search of THC. CBD levels, on the other hand, are decided low, much less than 1%. This means this strain is not a good selection for patients whose symptoms require CBD.