Crops
Start with planting a crop. Exit out of your game and go to Setup, Date and Time settings, then alter the time ahead how numerous hours or minutes the crop ought to take to expand. Lastly, return into the game and the crop ought to be completely expanded.
Easy experience
Plow empty land to gain 1 experience point but lose 10 coins. Sell the plowed land to get the 10 coins back while keeping the experience. This can be repeated as many times as desired, but is less effective in later levels because of the low amount of experience gained.
Getting brains
Exit the game, then go to "Settings", then "General", then "Date And Time". Advance one day, then resume the game and check your daily surprise. You will not always get a brain, you will most likely get gold. The amount of gold depends on how many of your friends also have Zombie Farm.