encil Cactus (Euphorbia tirucalli) – a unique and captivating addition to your garden or indoor plant collection! Also known as the "Firestick Plant" or "African Milk Tree," this distinctive succulent boasts slender, pencil-like stems that are sure to elevate the aesthetic appeal of any space. Full sun. Perfect for a sunny window, great inside or outside. Will grow huge!! Please have a container ready to plant immediately for best results.