Phoenix canariensis

Family: Arecaceae          Origin: Canary Islands
Technically invasive but somehow is forgiven by many; the Canary Island Date Palm (a close relative of the true Date Palm) is widespread in most tropical and subtropical lands around the world. In some areas, it’s naturalized and stands solitarily, enjoyed in the landscapes and gardens of people around the world. Here in Australia, it’s easily found in cultivation and in the wild. When people around the world think of palm trees in the tropics, they usually picture the Canary Date Palm or something very much like it. This palm is sometimes referred to as a pineapple of sorts, but this is false. Pineapples are much different from palms, most notably with pineapples growing on plants near the ground and not on trees.

Arboriculture

Growth Form

A large loner, Phoenix canariensis typically reaches heights of 20 metres in captivity but is found much taller in naturalized areas, sometimes reaching heights of 40 metres. The tree is single trunked with a canopy of leaves at the top as they are shed from the bottom up as the tree grows. The shape of the canopy is round and even. It does not have a crown shaft.

Trunk

The trunk is thick and light tank to grey, and leaf scars make up its regular notched texture.

Flowering

Big broom-like panicles loaded with tiny yellow flowers in the summer are scented, sometimes drooping. They are enjoyed by pollinating insects.

Foliage

The emerald green leaves are pinnate, up to 6 metres long each with up to 200 leaflets on each frond in a single rank on each side. They have long, sharp spines on the leaf base which can cause painful injuries. Although self-cleaning, usually fronds will be removed before expiring completely to improve the appearance of the palm tree. They leave attractive, diamond-shaped leaf scars giving the trunk its distinctive pattern.

Fruits

The flowers fade to form yellow and orange oval shaped fruit about 20mm long and 10mm wide that contains a single large nut. It’s said that the pulp of the fruit is very edible, but the amount makes them a pretty worthless snack for people. Some animals enjoy the fruit pulp themselves.

Management

Propagation

Unlike P. dactylifera, the palm used to produce commercial dates, the Canary Island Date Palm doesn’t sucker and can only be propagated by seed. Growth rate is slow.

Cultivation

Relatively hardy for a palm that originates out of temperate areas, Phoenix canariensis can be enjoyed in areas where temperatures reach -12c on occasion. This palm is not picky about soil type either. It does require full sun exposure and well drained medium to grow in. It can tolerate salt spray which makes it a valuable coastal and urban tree in areas where it fits (this is a large palm at maturity).

Plant new trees in areas with full sun exposure all day, and give this little tree plenty of room to grow. Fill the new hole with amendments such as well rotted compost and organic material to give young transplants a good boost. In Brisbane they should be watered regularly until established, but once they are comfortable you can relax on the watering and simply enjoy. The soil can be treated with a 3-1-3 fertilizer.

Watch for seedlings sprouting below the tree after fruiting. Remove these seedlings to help prevent this tree from spreading. Alternatively, repot them while very small for propogating. If not done early they tend to grow away from the parent, causing them to grow skew.

Diseases and Problems

Canary Island Date Palms are susceptible to Fusarium Wilt, a disease caused by Fusarium oxysporum, a fungus. It is always fatal to an infected tree. It has killed several hundred date palms in Centennial Park in Sydney. Infection can be transferred from tree to tree by cutting instruments and contaminated soil.

Like other palms, Canary Island date palms are sensitive to alkaline soils. They also struggle in soils with low nitrogen and zinc.