Blueberry, also known as "Berry Blue," is an indica marijuana strain made by crossing what is thought to be Purple Thai with Afghan. The Blueberry high has a euphoric and hazy feel to it that creeps up on you slowly before washing over you with a sense of calm and ease. As this high grows, your mind will fall into a state of hazy introspection that immediately erases any negative or racing thoughts and numbs the brain. Blueberry is said to be perfect for treating conditions such as chronic fatigue, depression, migraines, and chronic stress or anxiety.