@MoeOC
The older (less removed from the wild parent varieties) cultivars are usually self fertile. The newer varieties that are not self fertile will still readily cross pollinate other cultivars to make viable seed, so planting another variety is a good idea. You can cross pollinate them yourself with a cotton tipped swab (in case your bees are lazy), and get more seeds. Some tips are:
1. Pollinate early before the pollen dries out.
2. Pick days that top out at less than 90 degrees.
3. Water frequently and generously while buds, flowers and seed pods are developing.
Have fun!
