Astelias prefer well-draining soil rich in organic matter, with some species tolerating moist conditions better than others. They thrive in both full sun and partial shade, depending on the species. When planting, choose a location that meets these light requirements. Water needs vary; however, most astelia species prefer consistent moisture without waterlogging. Prepare the planting area by loosening the soil and incorporating compost. Dig a hole twice as wide as the root ball, set the plant at the same depth it was in the container, and water thoroughly. Mulch to retain moisture and reduce weeds, being careful not to cover the crown. Recognize that different species may have specific requirements; adjust care accordingly.