Lazy Gardener
Super Self-Sufficient
I find that one of the most useful seedling containers is the cheap styrofoam cups.  The seedlings seem to grow very well in the cups, perhaps b/c the roots are "insulated" and the cups hold a good amount of soil?  I use quite a few of the seedling flats every season:  the 6 packs.  I find that Marigolds are so resilient that I just broadcast them into a styrofoam meat tray, then pull them apart to plant out into the garden.  No individual pots for Marigolds!!!  My favorite potting mix is Pro-Mix.  A bale will last me 1 - 2 years.