You might try putting a request in the trade or seeds forums. I have seen seeds for sale in several nursery catalogues. I haven't tried Daturas because they are annuals and I'm trying to make life easier by not growing so many annuals.
Brugmansia in Texas?
Betty - not all Danturas are annuals. I have the whites come back every year and if winter is light I have been told that the doubles will come back too - mulch is the key.
The Jimsonweed (white) will come back but my triple purple ones didn't. I didn't get any seeds from the double purple this year, since they froze last week. I will look and see if I have any of the triple ones.
Hey ya'll, thanks for the response on the Daturas, how do I find out the difference, do Angel Trumpets put on seed pods? By they way, I had inquired about Texas Silverado Sages putting on seeds, or spreading by roots. I got an answer from Texas Gardening, they do put on seeds after blooming. Needless to say, I have been gathering seed pods left and right! I would love some of the purple seeds from the double Datures, and any other colors.
It's confusing because some people do call the Datura's Angel's Trumpets but some only know the Brugs as AT. I think both actually are called that but they are different.
The Brugs flowers hang down and smell wonderful! This is my first year for a Brugs so I don't know anything about seeds on them.
The Datura flowers point up and as far as I know only the white one smells. The white one is what most call Jimsonweed or Moonflower. It is a wonderful night bloomer and it's seed pods are the spiny balls filled with hundreds of seeds. I have a double purple that is still alive and has a few more blooms on it so maybe I'll get some seeds.
When the Brugmansias were first names, they were given the genus name Brugmansia. Later the plants were lumped into one group with the Daturas. The plants were divided into 2 subgroups. As konkreteblond has stated most Brug flowers hang down while Datura flowers open upward. There are other differences between the two groups. The Brugs, with a few exceptions, are not self-fertile. That is they will not produce seed unless they are cross pollinated by a different variety. The seeds do not produce plants identical to the parent plant. The Datura will self seed. The seed pods of Brugmansias have a smooth surface while the seed pods of the Datura have spine like projections. The leaves on Brugmansias are long large and eliptica. The leaves of Datura are about as wide as they are long and are lobed. Brugmansias are large trees or shrubs. Some are evergreen. The Daturas are mostly annuals or short lived perennials. There are some chemical differences between the two groups. It was later decided that there were enough differences between the two subgroups that the genus name was returned to the Brugmansias. That's were the confusion lies. Some people still call the Brugs by the name Datura.
Thanks bettydee! That is great information.