Archontophoenix cunninghamiana
King Palm
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King Palm (Archontophoenix cunninghamiana) - Description
King Palm (Archontophoenix cunninghamiana) is an evergreen semi-frost tolerant palm native to the rain forest's of New South Wales and Queensland in eastern Australia. It is hardy in zones 10a-11b. Regularly reaching heights of 80 feet tall and has a spread 10-15 feet. The trunk is gray/brown, smooth, ringed and slender only reaching a diameter of 8-12 inches. Gray-green leaves are pinnate or feathery shaped reaching lengths of 10 feet and widths of 5 feet. Trees bloom in mid summer with violet-lavender blooms that form under the leaves. Blooms turn into copious amounts of red fruits at maturity. Outdoor King Palm does well in fertile, humus rich, moist but well drained soil.
King Palm (Archontophoenix cunninghamiana) - Blooming
When mature King Palm (Archontophoenix cunninghamiana) blooms in mid-summer. It forms large clusters of small violet-lavender blooms under the leaves. After blooming enormous amounts of small red fruits form that attract birds.
King Palm (Archontophoenix cunninghamiana) - Growth
King Palm (Archontophoenix cunninghamiana) is a very fast growing palm extending 1-3 feet a year up to 80 feet tall. It has a smooth gray-brown slender ringed trunk. The slim trunk only reaches a diameter of 8-12 inches at maturity. The gray-green leaves are pinnate or feathery looking reaching lengths of 10 ft and widths of 5 feet.
King Palm (Archontophoenix cunninghamiana) - Planting
Outside in the landscape King Palm (Archontophoenix cunninghamiana) should be transplanted in a spot that gets partial shade to partial sun. The plant can tolerate direct sun if watered well but will suffer leaf scorch if it dries out too much. First dig a hole twice the size of the root ball and deep enough that the top of it sits flush with the soil surface. Refill the remaining space around the root ball with loose top soil and water in well. Trees should be given some support until the tap root extends into the soil. Wind can sometimes topple the trees if not properly supported the first growing season after transplant.If transplanting to a container first choose a big enough pot to support the plants size. The plant is a fast grower that extends up to 1-3 feet per year so take that into consideration when choosing a container. Choose a well draining potting soil. Transplant so that the top of the root ball sits flush with the soil surface and water in well.
King Palm (Archontophoenix cunninghamiana) - Pest
When grown inside King Palms (Archontophoenix cunninghamiana) can suffer from spider mites. The plants will also get leaf spot, Phytopthora root rot and aerial blight.
King Palm (Archontophoenix cunninghamiana) - Interesting facts
The King Palm (Archontophoenix cunninghamiana) in southern Brazil is considered an invasive species. This is due to the large amount of seeds it produces, quick growth rate, ideal environment for seedlings or plants and has also benefited from the local extinction of the native palm Euterpe edulis.
King Palm (Archontophoenix cunninghamiana) - Soil and irrigation
Outside in the landscape and the natural environment King Palm (Archontophoenix cunninghamiana) does well in acidic to neutral soil types. It should be grown in fertile, humus rich, moist but well draining soil. King Palm likes a bit more water than most palms. Water requirements are moderate to high in the growing season and should not be allowed to fully dry out.When growing in a container choose a well draining potting soil. During the growing season make sure to regularly water never allowing it to dry completely. During the dormant season keep the soil moist but not saturated.
