For how many years do Brugmansia seeds retain their viability at room temperature?

Thanks in advance!

Brugmansia seeds are viable for 3 years. If you use Ga3 one might germinate after 4 years. The good news is you will NEVER run out of seeds once you have 3 or more plants. The seed pods hold 50+ seeds even in a bad year. The pod emerges from the spent flower so do not be so anxious to pluck them off of the plant.

Danita, I have had 5 year old seeds sprout but they were kept in the garage. Daturas have a 30 year life span.