Remy--thank you so much. I didn't realize peppers don't need pollination from another flower. We had a difficult growing season here early on (lots of cool temps/rain), so that might have been part of the problem when I tried earlier. I don't think I have 500 ft. between these and my other peppers, but the others have not flowered or set fruit for quite some time, while this plant is still blooming and setting fruit. We're having lots of warm temps recently, so pepper is loving that!
I really appreciate you sharing this information with me--it will be so helpful.