m0useanswered grow question 3 years ago I would not use grow diaries information. I get it straight from the breeder.
https://www.worldofseeds.com/eng/afghan-kush-ryder.html
Given this is an autoflower, 70days is accurate, that's whats on the breeds webpage.
What Growdiaries might mean is it full into its flowering stage by 45days??? doesn't matter bad info.
Theirs two systems in place for calculating harvest time, one for photoperiods and one for autoflowers in regards to breeders suggested harvest times. They are also not the best thing to use in the world. they are ballpark figures, some plants fall in that range others don't, you need to judge this on a plant by plant basis and look at trichomes for harvest time.
Autos are veg+ flower = suggested harvest time
Photos are flower only = suggested harvest time
This is because you can veg out a photoperiod plant for as long as you want. the only factor that determines if its going to flower is the light cycle.
and If you look at autos suggested times on a breeders site they tend to be longer then photoperiods because of this included veg time.
Google trichome cannabis chart and look at the colours of when its ready to harvest via the trichomes.
Best of Luck and Happy Growing!