Its blades are a gray-green color and are short, usually 1 to 4 inches (3-10 cm)long with rough edges. The erect stems can grow 0.3 to 1.3 feet (0.1-0.4 m) tall. The stems are slightly flattened, and an inflorescent purple in color. Bermuda grass reproduces through seeds and through runners and rhizomes. The seedheads are on 1-3 inch (3-7 cm) spikes and are themselves about 2 inches long. Bermuda grass will put out seeds about 3 months after planting. The seeds germinate at temperatures above 68° F (20° C), and begin to grow within 2 weeks. One plant can cover an area of 3 square yards (2.5 sqm.) in just 150 days after germinating. Bermuda grass can grow in poor soil. During droughts the upper parts die off, but the grass will keep growing from its rhizomes. It prefers moist and warm climates, and where there is more than 16 inches (410 mm) of rainfall a year. Bermuda grass is an early successional grass, and is first to grow back after grass fires, which burn quite often on the African savanna.