I would suggest 2 weeks at a minimum and maybe as long as 4 weeks. The time frame the breeders give are only a guide and in my experience, generally somewhat optimistic. All the breeders want your money so they try to out do each other with all sorts of claims, time to harvest being the first casualty of truth. Their times are based on the quickest example of a strain growing under optimal conditions by professional growers. These time frames do not take into consideration every method used by every grower in the world. There are so many variables involved with cannabis growth and maturation, such as temps, light intensity, nutrient used, plant phenotype, grower experience, substrates etc. that no plant will ever read the instructions and obey what the sales pitch is telling them. You still have some time to wait before your particular plant is ready. Continue with your current care routine and you should be able to harvest some home grown flowers soon enough.
Hope this helps....
Organoman.