You pick the plants and have occupied soil, kill the vermin and plant something and have wiggling or allured to fight. I have not been able to do 16 plots and have 16 nonfights so far, out of the 32 possible chances ( 16 picking then 16 planting ) I average 20 or so fights.
It would not be bad if I only had to worry about insects or parched ( since Blizzard used the sprinkler and bug zappers as a Gold sink ) but having to kill over 12 Mobs and never see any Loot drop how sad. And the scarecrow they sell you, making you think you are getting something to help chase away birds is useless.
After you get Friends on the Farm or title Master of the Ways you would expect something to get easier instead of getting harder each time you do some farming.