i herd a story form my homie, Santa Maria, is a cross indicaXsativa and start to finish is 60 days and is almost like a LR going straight into veg
Seems hard to believe since im pretty sure its not possable for a plant to flower in only months, wishful thinking though.
Fastest strain in the world is Lowryder, at least to my knowlage.
Also, lr doesnt go straight into veg, it goes straight into flower as soon as it breaks soil, which is why it only takes 90 days... 3 months... the normal flowering time for a plant.
I wouldnt be looking for the "fastest" growing strain anyway though, ive grown lowryder for a couple years now and have worked with it to make my own autoflowering crosses also, its a nice concept but you are sacraficeing yeild GREATLY. I grew 44 lowryder females at one time, and still didnt even come close to yeilding what i did on a 13 foot plant that was outside.