Crop Growth Speed (help needed)

[Monjii]

Hi, so I have a skyblock server

and I want to make it so players can upgrade their crop growth speed.
Any ideas of how I can do this? Are there any plugins out there already?

Also for mob spawn rates from spawners, while we are at it

 

[Monjii]

There are modifiers in your spigot.yml if you are running a Spigot server. That will upgrade the overall, however if you want different growths that players could upgrade I could quite easily make you one as I am already working on a similar concept for a Farming server.

and spawner speed?

 

[Lee]

and spawner speed?

There are many setups that offer this, you could always buy one and look at the permissions they give people to increase the growth speed.