Still in my first series of grows, but I started flowering one at 10" and one at 13". Over 5 weeks of flowering, one is at 28" the other 54". I had bought a feminized pack from Sensi Seed, so not sure the strain of each. So the taller plant is more than likely a sativa.
My second grow I put both into flowering at 10", and about 2 weeks later they have grown 13-15" each. Both are Jack Flash #5.
Hope this helps.