Although Cordyline Red Sister (Cordyline fruticosa), isn't difficult to grow, the plant is a warm climate plant that won't tolerate temperatures below 12.8 degrees Celsius. If you live in a climate cooler than U.S. Department of Agriculture hardiness zone 10, grow Cordyline Red Sister indoors or bring the plant inside when the temperature begins to drop in autumn.
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Cordyline is an evergreen shrub with long, strappy leaves that grow from a central clump. The colours of the plant vary depending on the variety. The foliage of Cordyline Red Sister is marked by intense shades of maroon, plum, pink and burgundy. Grown outdoors, Cordyline Red Sister can reach heights of up to 15 feet with leaves 12 to 30 inches long. Indoors, plant size is generally limited to 3 to 6 feet in height.
Cordyline Red Sister needs plenty of sunlight in order to display the bright colours. Outdoor-grown Cordyline Red Sister benefits from bright morning sunlight and afternoon shade. Place indoor plants in a bright location a few feet from a sunny window.
Whether grown indoors or outdoors, Cordyline Red Sister benefits from consistently moist soil. The exception is during the winter months when indoor plants are watered sparingly and the soil allowed to dry slightly between waterings. Indoor Cordyline Red Sister benefits from a humidity tray to increase humidity around the plant. To make a humidity tray, place a layer of pebbles or gravel in a shallow tray. Set the pot on the tray. Add just enough water to the tray to keep the pebbles wet, as the bottom of the pot should sit on the wet pebbles but not in the water.
Fertilise Cordyline Red Sister once every month during the growing season. Feed outdoor plants a general purpose, water-soluble or granular fertiliser. Cordyline Red Sister grown indoors benefits from a an all-purpose liquid fertiliser for indoor plants. Apply the fertiliser according to the rate specifications suggested on the label. Withhold fertiliser during the winter months.
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