To maintain Cordyline, plant in well-draining soil with full to partial sunlight. Water regularly, allowing the soil to dry slightly between waterings, and ensure proper drainage to prevent root rot. Fertilize with a balanced, slow-release fertilizer during the growing season. Prune any damaged or dead leaves to keep the plant tidy. Protect from strong winds, as the long, narrow leaves can be damaged easily. In colder climates, bring the plant indoors or protect it during the winter. Keep an eye out for pests and provide good air circulation.