I've got several sativas going right now. I did alot of trimming on mine to get them to branch out into multiple tops. I vegged for about 2 months, and they have been flowering for 7 weeks tomorrow. The strains call for 12-14 weeks to finish flowering, so I am counting on the 14 weeks. I have a harvest date, and I planned it from when I started them in 12/12. They did stretch about 2x their size after I changed them over, but I had planned for it so it wasn't a problem. They all have some great looking collas forming, but even at seven weeks its obvious they ahve alot more time to go. I have a WW plant which is a hybrid (indica/sativa) and it is at just over 6 weeks, and it is so much farther along then the sativas. Its only got about 4 more weeks according to the breeder, but I'm prolly gonna flush it in about 4 weeks, and give it another 1-2 weeks of flush, so it will lend up getting about 11-12 weeks in the end. You can check out my journal if you wanna see what the sativas look like. There are pictures about 2-3 pages from the end. Peace man, hope the grow goes well!!