Alternanthera are popular for their colorful foliage that includes several shades of burgundy, red, orange, yellow and lime green. Some species have single-or bi-colored leaves, while others have the entire rainbow of color in a single plant. These frost-tender perennials are grown as annuals and range in size from 2-inch dwarfs to 12-inch mounds of foliage. The plants aren’t picky about the soil as long as it is well-drained and not too rich. The plants grow well in both sun and partial shade, but the colors are more intense in full sun. Water the plants often enough to keep the soil from completely drying out. They generally don’t need additional fertilizer, but if they aren’t growing well, try giving them a shovelful of compost in summer. Cut them back if the mounds start to sprawl or spread open.