The firestick plant (Euphorbia tirucalli) is a colorful tropical succulent. Its green stems turn yellow in summer, then turn fiery shades of orange, pink, and red in winter. The more sun the plant ...

1. Pencil Cactus In conversation with Lisa Eldred Steinkopf also known by her online alias 'The Houseplant Guru', she tells us that euphorbia tirucalli, commonly called pencil cactus is at the top ...