I grew Blue Dream auto on my last grow and the total grow time was 93 days (27 veg, 66 flower).  I keep spreadsheets on my plants to include the germination date, start of veg, start of flower.  I then compare those numbers to what it says on the seed supplier's website.  I find that the total time they talk about is usually the same that i get just from the flower cycle.  But i mostly rely on what i am seeing the plant doing and go from there.  Beautiful plant by the way.