Alternanthera lilacina from South America needs plenty of light to grow and form dark-red leaves. Alternanthera lilacina is a more difficult plant to grow, needing very bright lighting good quantities of CO2 infusion and a good nutritious substrate if the deep red/purple colours are to be achieved. Hardiness: Moderate Light Needed: Medium Plant Structure: Stem Family: Amaranthaceae Genus: Alternanthera Region: South America Size: Stem width: 5-15cm Growth Rate: Medium. Can Be Grown Emersed: Yes