I dont know if some has posted this but its simple
Just get the time in minutes, so if the crop grows in 12 hours you just have to multiply 12x60 = 720
In the CE search for this number in double.
Delete the results that are 720.xxxxx, just leave the 720 clean ones.
Select all and change to the value you want, I use 3, so crop grows in 3 minutes.

sometime when u change the value it crashes, in this case just retry, you should get around 150 to 300 values, with some low values like 2 hours or 1 hour ( 120 or 60)
you will get a lot of results, in this case do the same get the whole results only, and just get 20 or 30 values and change till u get ur crop growing time changed. If u change all of them it probably crash the game.

Also animals feed time are modified while u do this, works on almost all animals, execpt in some cows.

Do this the first thing after u open the game, so you get less results for the searchs,
I dont know why but if u keep a while playing and then do the search, you get much more results that if u change the value the game crashes.