I haven't read through everything yet just wanted to add something. Mg seed starting soil. You do know that seed starting soil has no nutrients in it at all right? Some brands will put in a minute amount of nutes to help people out that leave their plants in it for too long but the whole idea of seed starting soil is to start seeds in. Just start. If you were to try to start seeds in some ocean forest he first roots likely wouldn't last a day out of their shell, burnt to a chrisp, pot is a little more rugged, but still somehtng to think about