Exact time of seed growth.

Hello,
I'm looking information about exact (in hours or minutes) times of growth of: cabbage, cereal, pumpkin, cotton.
Salem wiki states about charcoal
3 Real life days are 72 hours. So dont belive statement 5 days etc on fields.
Also, if I speed up time with fertilizer. to 200%, time is divided by 2, Is it half of whole time, or remaining time halves?
Searched forums but couldnt find.
I'm looking information about exact (in hours or minutes) times of growth of: cabbage, cereal, pumpkin, cotton.
Salem wiki states about charcoal
It takes 3 real life days to burn (56 hours), after which it leaves
3 Real life days are 72 hours. So dont belive statement 5 days etc on fields.
Also, if I speed up time with fertilizer. to 200%, time is divided by 2, Is it half of whole time, or remaining time halves?
Searched forums but couldnt find.