Cordyline Maria Plants (Cordyline fruticosa 'Maria') are tropical houseplants that thrive outdoors in hardiness zones 9 through 12. Maria plants have electric pink, leathery lance-shaped leaves. Their appearance adds a pop of colorful tropics to any indoor or outdoor space. Cordyline Maria houseplants are extremely easy to grow. These plants require bright, indirect sunlight and well-draining, moist soil conditions. They can also be outdoors in the warm summer months. Cordyline plants produce small flowers in the summertime, but when they are houseplants, this rarely occurs.