How often should I fertilize my crops?

[Dustytome]

Fertilizing plants has an hour cooldown and it decreases the growing time by an hour. If you fertilize a plant every hour you'll cut the growing time in half. There is no diminishing returns, every time you fertilize will decrease the time by 1 hour.

According to some fertilizer findings that may not be entirely true. I've had some sporadic results myself, but without log server side tracking things it's hard for me to keep on top of it all when I did my own testing. I'm in the 'not worth it' camp myself, mostly because I manage to fertilize something just enough so it pops when I've gone to bed and all that time I've saved fertilizing it is usually used up when I'm asleep.