#4: Angel Trumpet (Brugmansia 'Dr. Seuss')
says, "This brug is supposed to have a nice scent, but I couldn't notice any scent at all. They may need to be more mature before the scent is noticeable. The blooms are huge and have a beautiful soft yellow color.
They don't like to dry out, but mine was planted in the ground in amended clay and required very little supplemental watering, even during a very hot and droughty summer. It was a small cutting that grew fast and bloomed beautifully starting in late summer. Unfortunately, I let it dry out too much over winter, which killed it, so I'll be trying it again with better winter care."