As the genus name indicates, this is the well-known source of tobacco leaf. There are over 65 species in this genus, the bulk of which are annuals and perennials native to tropical and subtropical America, a well as Australia. Most species are tall and treelike but a few species grow as shrubs, though they tend to be softwooded and short-lived. Their leaves are usually deep green, very large, and covered with fine hairs. They are sticky to the touch, and may exude a fragrance when crushed. The attractive flowers are tubular or bell-shaped; mostly white or in pastel shades of green, pale yellow, pink, or soft red; and usually open only in the early evening or at night. If the blooms are fragrant, the scent is also often released at night.
CULTIVATION
Most tobacco species are marginally frost hardy to frost tender. They grow best in warm humid climates with ample summer rainfall in full sun or partial shade. They require soil that is moist, well-drained, and reasonably fertile. Most Nicotiana species are propagated from seed sown in the spring, though some will grow from cuttings.
Top Tip
Many Nicotiana species are happy in large containers. Use a multi-purpose compost and add a slow-release fertilizer to the soil before planting.
CULTIVATION
Most tobacco species are marginally frost hardy to frost tender. They grow best in warm humid climates with ample summer rainfall in full sun or partial shade. They require soil that is moist, well-drained, and reasonably fertile. Most Nicotiana species are propagated from seed sown in the spring, though some will grow from cuttings.
Top Tip
Many Nicotiana species are happy in large containers. Use a multi-purpose compost and add a slow-release fertilizer to the soil before planting.
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