CBD flowers For many years, the primary goal of cannabis breeders and growers was to increase the THC levels in cannabis strains to meet market demand. In recent years, as the benefits of CBD have become realised, a demand for CBD-rich strains of cannabis has emerged. In the context of hemp buds, CBD richness is referring to the CBD content of a cannabis strain. A ‘CBD-rich’ strain has been specially bred to contain a high-CBD content but low-THC content, allowing it to be so