Here are a few sites that we have used or currently use for veggies and flowers. There is also one for herbs. Here are the links.
http://www.seedsofchange.com/ (organic seeds) a.k.a. heirloom
I really recommend checking with your local extension office before starting a garden if you have never planted one before. They have all types of tips and info. They can tell you what, when and how to plant. Most counties also have Master Gardener associations that will help you get started. There is also this link (http://www.garden.org/) to the National Gardening Association. They will send you emails with info for your specific area. The emails contain valuable advice, techniques and recommendations from the experts.
I will post more about gardening and our farm as the season progresses. If I can help anyone or anyone has any questions please feel free to email me at firstname.lastname@example.org or leave a comment! Blessings!!!!!!