I found myself in a situation where I needed to find the fastest growing buds. I had to move in 9 weeks and needed medicine to last until I could grow again, and then it would have to be fast too. So I did a whole lot of research. Check these yourself, some say "flowering time" meaning seed to harvest, some mean after vegetation flowering time, but I tried to keep those out. I am not perfect though so double check for yourself. 42 days start to finish http://original-ssc.com/sweet-seeds-black-jack-autoflowering.html 50 days http://www.autofloweringseeds.com/cream-of-the-crop-amphetamine-autoflowering-feminised-seeds-3642 56 days http://www.herbiesheadshop.com/pyramid-auto-anubis-autoflowering-feminised-seeds-3437 45-50 days http://www.nirvanashop.com/en/autoflowering-marijuana/815-blue-mystic-feminized-autoflower-5-seeds.html 42 days http://www.autofloweringseeds.com/green-house-big-bang-autoflowering-feminised-seeds-2776 42 days http://www.avalonmagicplants.com/marijuana-seeds/sweet-seeds/speed-devil-seeds.html 35 days https://www.cannabis-seeds-bank.co.uk/sweet-seeds-fast-bud-2-auto/prod_2552.html 35 days https://www.cannabis-seeds-bank.co.uk/sweet-seeds-fast-bud-2-auto/prod_2552.html 45-55 days http://www.autofloweringseeds.com/world-of-seeds-auto-collection-afghan-kush-ryder-autoflowering-feminised-seeds-1961 45-55 days http://www.autofloweringseeds.com/world-of-seeds-pakistan-ryder-autoflowering-feminised-seeds-1899 35-42 days http://www.autofloweringseeds.com/kannabia-gnomo-automatic-autoflowering-feminised-seeds-2049 Remember to double check these, this is meant as a guide not the ultimate list. Go, Grow, Blow your mind! And have fun!