Lemon Kush, also known as "Cali Lemon Kush," is a hybrid marijuana strain. The general consensus surrounding Lemon Kush is that is a cross between Mater Kush and Lemon Joy. However, breeder specific variations exist. Alien Genetics,The genetics are the only area of dispute as everyone will agree that the sweet flavors of lemon and citrus mix exceptionally well with the earthy kush undertones.