how much do you water?

I have a few questions so bare with me.(i numbered them to make it easier to awnser)

1.If i where to have a plant out side planted directly in to the ground...how many times a week would i water it(if it didnt rain at all that week)?

2.If i were to watered them once every 5 days how often would i feed them?

3.When planting directly into the ground should i dig a hole and fill with soil?

4.If i were to dig a hole and fill...how deep would if have to be.....Its mostly sand where i live but trees grow in it so why not bud

5.what should i use to keep away pests(deer,slugs,insects).

6.I heard mothballs work for deer. Is this true?

Ok maybe its not just a question about watering after all....lol