soil from outdoors generally contains pests that could irritate your plant later on in life. ideally you should use a inexpensive compost from your local garden center. mj does not like Muddy soil as it cuts of oxygen to the roots stunts growth and in some extreme cases the plant can drown.

Nutrients are generally needed as mj use a lot of them through its stages of growth. for example a lack of nitrogen will coarse the plants leaves to turn a light shade of yellow. Ul find a lot of people discourage the use of miracle grow on this site but others praise it. If your on tight budget miracle grow should do the job.