The information below comes from the Ladybird Johnson Wildflower Center PLANT DATABASE.
Propagation Material: Seeds
Description:
The seed is exceptionally small and somewhat difficult to
germinate. The best results have come from surface seeding
(since the seed requires light for germination) in flats at
approximately 70 75 degrees. Field seeding can be done in
spring or fall, however, spring germination usually results in
the vegetative growth overwintering and not flowering until
the second summer. Fall germination should produce flowers the
first season.

Because the seeds require a soil temperature of 70º to 75º it would have been better to sow earlier in the fall. Winter is nearly upon us. You might still start some in flats indoors, then move them to a cold frame over winter. Otherwise, it would be best to wait for spring warmth before sowing.

I have over the years sown seed in the fall that failed to germinate then, but came up the next fall when rainfall was more plentiful. In fact, germination has been more successful when we had rain than when I irrigated. Commercial varieties are sold under the name of Lisianthus, and include double-flowered and picotee-edged varieties.

I have had success germinating them in 4" pots in the fall. I had not one come up of the seeds that I broadcasted. IN my area, they only grow near streams so It might have been that my area was not a ago place for them to germinate in. Matter of fact they do not grow most years and only grow on years of ample rain.

I heard that many of the commercially grown Lisanthus were sterile.

Thanks to both of you for this information. I might be late in getting them broadcast. So, I'll wait till Spring. But, I'll try some 4" pots, too. I wish the nurseries around us soil them. But, if the commercial seeds are sterile, then that might explain a lot. With this being the season of ample rain. I probably missed this window of opportunity. There isn't anything more beautiful than a field of Texas Bluebells. But, I'll try nonetheless.

Thanks you guys!