Miracle gro seed starting mix will grow it good for a while. Mix with half perlite if indoors to aid it in drying out quicker and getting more oxygen to the roots. If outdoors I would cover thedark soil up with the white perlite and use light colored pot. The sun will cook the roots easily if it really gets hot. Fish emulsion fertilizer from the home depot is some good organic stuff so you dont smoke chemicals. The ones in the potting mix will be long gone by bud time.