m0useanswered grow question 3 years ago Only the breeders will know if its a Fast Version.
Fast version strains are a combination of photoperiod and ruderalis "autoflower" genetics mixed into one.
They tend to finish flowering a week or two earlier then their purely photoperiod counterparts.
They do not have enough auto in them to be fully an autoflower, but if they self pollinated themselves some fully automatic flowering plants may come out of it.
If you know who made this mix, you can ask them if it has any autoflower genetics in it.
If they say yes, you can make a broad assumption that it is a Fast version but its not 100%
Good Luck!