Blue Boy is a sativa-dominant hybrid strain of cannabis. It is a cross of Blue Dream and Northern Lights #5 and was originally bred in the U.S. state of Washington. Plants grow large and bushy and its flowers are large and loose. THC levels can exceed 20%. According to Leafly, Blue Boy "will give you anything but the blues" and "provides focused, cerebral effects that make it a great choice for daytime use".