Hi Ricker, Welcome.
This forum (LA/MS) hasn't been very active lately. You might ask your question on vegetable forum, or container gardening too. I think it is easiest to buy potting soil (not garden or top soil) for your containers. Some of them have a slow release fertilizer already added, some have moisture crystals which help the soil retain water.
I did find this online "Tom MacCubbin, gardening expert and author of several great books recommends this mixture: 2 quarts sphagnum peat moss, 2 quarts horticultural vermiculite, 1/2 tablespoon dolomitic lime. This mix works for both seeds and transplants."
I can't vouch for MacCubbin, don't know that author. Also thought you might like to know about this website, if you don't already, msucares.com which is the Mississippi State ag/home gardening website. Also you can find your county's master gardeners if you google them. They usually have a hotline type service where you call with questions, they sent you alot of free info too, on all kinds of garden topics.
Laurie

laurie: Thanks for the advice. Finding the right soil mixture is quite confusing. I'll check some other forums as you suggested.

Ricker