Lineage: Blueberry x Haze Blue Dream is a sativa marijuana strain made by crossing Blueberry with Haze. This strain produces a balanced high, along with effects such as cerebral stimulation and full-body relaxation. Blue dream is potent strain a fan favorite of both novice and veteran cannabis consumers. In terms of flavor, Blue Dream is reported to smell and taste like sweet berries. Medical marijuana patients often use Blue Dream to treat symptoms of depression, chronic pain, and nausea.