A regular strain will take approximately 3-4 months to complete ... it takes about 45 das for a plant to get sexually mature ( you can force flower earlier , but things go much smoother if they are mature enough to flower IMHO) autos take about 60-80 days..the super autos are taking up to 120 ( I understand, personally I have not grown one of the "supers") so the actual time difference can fluctuate ... ' best bet for a new grower , get a couple autos, and some photoperiods. the autos will finish up just about the time your photos are going deep into bloom .. and will keep you from harvesting early ,to smoke your shit. my .02 Wharf