Amaranthus is a genus containing over 60 annual or short-lived perennial species from the Amaranthaceae family. They come from a range of different habitats including temperate and tropical fields and wastelands, and they can be invasive. In cultivation, some species are used as ornamental plants due to their long plume-like and usually red or green inflorescences which are arranged densely and are upright or pendula. These are followed by colourful seedheads and some also have colourful foliage. Different species can grow in a range of habitats and many are considered weeds. While some are good for cut or dried flower arrangements, others are used for summer bedding, for container planting or displayed in temperate greenhouses.