Gardens in the south.

Answer 1

My opinion is that there are three most important factors to "grow a decent garden":

Growing conditions, growing conditions, growing conditions.

Start with soil testing and recommended amendments.

https://www.wikihow.com/Prepare-a-New-Garden-Bed

Water management is the next consideration.

Give us a hint of what you want to grow, how much land area, and existing conditions that are challenging your gardening know how. Photos are good. We will try to help.