milorganite?

hey iam planning on growing my plant in this soil. http://www.lowes.com/lowes/lkn?actio...821&lpage=none

is that okay to start my seeds in AND use it for when the plant gets big?

also iam planning on adding other nutrients in my watering maybe once a week or once every 2 weeks

or is this soil better ?

http://www.lowes.com/lowes/lkn?actio...394&lpage=none

or can someone tell me a perfect brand to use to start my seeds in and keep it in untill its big(i dont wanna make my own)