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OK, I like all the Nicotianas. For different reasons. Some I like for their fragrance, some for the color of their flowers. This one, tree tobacco (Nicotiana glauca), earns my affection for the lovely blue gray of its foliage. I grow this South American native as an annual, but in some parts of the world this can top off at more than 20 feet. Hereabouts it rarely reaches a third that height. It does get some attractively dangling, yellow, trumpet-shaped flowers, but only rarely for me. The leaves are what this is all about--they can easily be big as your hand, and their color comes in handy for making neat foliar compositions and groupings. I often cut plants back to make them bushier.