You can find prepared seed mixes in catalogues that specialize in wildflowers. You can also create your own mix by selecting seeds for those flowers you like. Selecting natives ensures that the plants are adapted to the region and should perform well, although many of the exotic species have naturalized and also do well in this climate. The exotic species listed in Appendix I are naturalized species. When choosing seeds to plant, there are several things to think about.
Some plants bloom in early spring, others in late summer, and some bloom for several months.
There are short wildflowers and some that reach four or five feet tall. You don't want to plant tall varieties that may obstruct your view of other areas. On the other hand, you can use tall varieties to screen off areas you wish to hide. You can create a mix of plants that bloom from early spring all the way into the fall. Selecting species that bloom at different times can ensure that you have flowers throughout the growing season.