The firestick plant (Euphorbia tirucalli ... Once the plant begins to grow in the spring, apply a cactus or all-purpose houseplant fertilizer, diluted to half strength. For outdoor plants ...

Other euphorbias include pencil plant, baseball “cactus,” and the all-time great name, “cows horn cactus,” Euphorbia grandicornis. Although most succulent euphorbias are from the Eastern ...