A tropical genus that has Tobacco as its most infamous member, but all of the 70-odd species are fragrant in flower or leaf, or both. Their pale, luminous flowers, often open in the evening, have attracted a lot of attention from hybridizers who have interbred species until it's hard to know what you've got. For our money, the best form is still the species N. alata (often called Jasmine Tobacco) which produces tall, graceful stems of pale, nodding flowers with starry faces. Its soft, sweet perfume peaks at dusk on warm nights, attracting exotic pollinators and domestic gardeners to its calming presence. Bloom starts in July and continues into fall in a protected spot. These 3-4ft plants stand up to rough weather without staking and are not fussy about soil. A half day of sun is plenty, which makes it easy to tuck them in near a door or window and get their perfume indoors. Perennial in Zone 10.