Summer annual. Ever more varieties are being developed, giving a wide range of colors, including white, salmon and purple, as well as the traditional bright red, and heights from about 8 in (20 cm) to nearly 3 ft (0.9 m). Leaves are bright to dark green, elliptical and toothed. Flowers grow on spikes and are two-lipped, with a flat lower lip and helmet-shaped upper lip. Average to slightly dry, well drained soil. Larger varieties with deeper roots need less water than dwarf varieties. Propagation: Seed.