I dont do very much outdoor stuff, just trying to expand on what others have said. Drainage is super important. We prefer to top dress the soil with poo vs mixing it in. That way we can add it after the girls are a little bigger, and so we can use different poop throughout the grow cycle, and like someone else said dont add to much cause you cant take it out, but you can always add more.

Dont overwater, make sure you let your soil dry out between watterings. You want to water thoroughly, and then wait 2 or 3 days to water again depending on how well your soil drains, how much direct sunlight etc. Good luck!