F 13 60/40 Sativa dominant hybrid that is a mix of Blueberry and Flo. F 13 has a sweet, fruity flavor, but is also a reported creeper so medicate moderately. F 13 is a great strain for pain while still wanting to be able to function socially. F 13 tastes so good you could end up over-medicating so exercise moderation or you could end up being lost in your thoughts and then pass out. F 13 could be good for patients looking for a multi-purpose medication. Growing F 13 Marijuana Has Medical Benefits.