Runtz Runtz, also known as "Runtz OG," is a rare type of hybrid marijuana strain. Runtz is made by Cookies Fam by crossing Zkittlez with Gelato and it is loved for its incredibly fruity flavor profile that smells just like a bag of the sugary candy we all know and love. Because of the rising popularity of this cannabis strain, This strain of weed produces euphoric highs and uplifting effects that are known to be long-lasting. Purple Caper Seeds released the same cross under the name Gelato Zkittlez.