So, at my local store they have potting soil, and huge bags of seed-growing soil. I'm not looking to spend much money, and I really only need a couple cups of it, for some Morning Glory seeds I was going to plant in a pot. Can you use potting soil for planting seeds? Again, I'm looking for the cheapest solution, next to getting dirt from my yard.

I have had no problem using Potting soil, I do sterilize it first.
http://tipnut.com/sterilize-so...

Thank you, thank you, thank you, NJBob!

I use Miracle Grow potting soils all the time. You can store it dry for months. It is already sterilized and from a place like Home Depot or Lowe's, they have different sizes.

I use MG potting soil mixed with perlite, I do a 50/50 mix

Thanks!

Plain peat moss with perlite mixed throughout is completely sterile and relatively inexpensive. Bagged potting mixes often have quality control issues with contaminants.