Also there is usually a date on good quality seed so you can be sure they are fresh. Don't buy seed that is older than a year, preferably look for "packed for 2015".
Some non-organic seed is treated with fungicide to keep it better, and others are coated with stuff to help with germination. If they are purely ornamental, not something you would eat, I don't see any harm and they really will give you a better rate of germination than organic seed.
