Consider the entire gardening year. Study old seed catalogs, but keep a cool head - don't order yet, and when you do order, avoid the beginners mistake of over ordering. Seed catalogs are packed with cultural information and new varieties being offered. New ones will be arriving between November and January. Prepare your soil - the ultimate key to success.
Healthy soil grows healthy plants.
Be sure to have a soil test done to determine the pH level of your soil and nutrients you may need to add. Use Extension recommended varieties. These varieties are tested locally and should grow well in your area. Select resistant varieties to reduce pests and the reduce the need to use pesticides. Regardless of the variety name and origin, some will perform better than others in your area with its unique soil type and climate.