Nicotiana glauca, commonly known as Tree Tobacco, is a semi-evergreen shrub or small tree native to the arid zones of Argentina and Bolivia. It has adapted to a variety of disturbed habitats, including riparian zones, roadsides, and urban areas, often where other plants struggle to survive. In its native South America, it is typically found in dry, open areas such as scrublands and riverbanks. Tree Tobacco can grow over 7 feet tall, with thick, rubbery, bluish-green leaves and yellow tubular flowers that bloom throughout the year in warmer climates, attracting hummingbirds and other pollinators.

Tree Tobacco is valued for its drought tolerance and ability to thrive in poor soils, making it a suitable choice for xeriscaping and restoration projects in arid environments. However, its invasive potential outside its native range should be considered before cultivation. It requires minimal water once established, prefers well-drained soils, and can tolerate full sun to partial shade. There are no popular garden cultivars due to its invasive nature and the fact that all parts of the plant are highly toxic if ingested. Tree Tobacco can spread aggressively and outcompete native flora, posing a significant ecological threat. It is also prone to pests such as aphids and whiteflies.CC BY-SA 4.0