Farmer experience

I’m finished with the hardware, designed a garden and am a bit stuck on what’s next. Sequences and remigens ofcourse, and I could then, I’m just missing knowledge what good regimens are, what is the goal, what decisions do farmers make?

For example, I could code it to pick up the water nozzle and water the garden. How often should I check the soil, and how do I know when the soil is too dry?