Growing your own seeds into transplants are a great way to save money, but more importantly, it is a great way to grow more unique varieties that are not normally found in the garden centers. For instance you are lucky to find one or two early tomato varieties but many catalogs carry up to 20 different early tomatoes that would be well suited for the High Plains.
Check out this great link to see when you should be starting most everything in the way of home seeds and plants. By the way, for best results consider that we are in zone 4. Thanks to John Scheepers Kitchen Garden Seeds.