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Other nocturnal blossoms deploy scents like siren calls: The creamy whorls of the moonflower vine hint at vanilla and sunscreen, while the heavy bells of brugmansia are franker and muskier in aura, verging on narcotic.

Don’t cut back woody plants like Brugmansia or hibiscus first either, he said: “Let winter do its damage, then clean them up when they come out of storage. If there is dieback and you already cut it back, you could have nothing.”

Let the Brugmansia or angel’s trumpet nap, too, along with that tropical hibiscus or tuberous Begonia boliviensis.

“There are some that are really worth keeping, because they just get better with age — like a Brugmansia,” he said.

They are Brugmansia by genus and angel’s trumpet in parlance, with elongated buds that open into blaring mouths.