Answer: Cestrum nocturnum is the night blooming jasmine, but the plant is too tender to grow outdoors all year around in the Pacific Northwest. Certainly you can plant it in a pot and take it indoors over the winter, but it won't perform well until it's back outdoors again. If you're willing to try growing a look-alike, Trachelospermum, or star jasmine, has delightfully fragrant, pinwheel-shaped blooms that mimic those of night blooming jasmine. These flowers open during the day, but the fragrance makes this plant worth growing. It's hardy outdoors and has a vining, climbing habit.
I'm not aware of a citrus tree unaffected by the winter snow and ice experienced in the Pacific Northwest. I'd take a wait and see attitude with the claims made on that one!
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