Macadamia sp.

USDA Plant Hardiness Zone Map

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In colder regions, Macadamia are grown successfully in large pots in sunny, sheltered position, with semi-regular waterings. When temperatures get down to 30s F. Macadamia nut needs to be covered with shelter (cloth) to protect from frost damage. When temperatures get below 28F, your plant needs special care - water sparingly and avoid fertilizing.

The Macadamia integrifolia, also referred to as the Macadamia nut, is a classic tropical tree native to Australia. It boasts a gorgeous, showy appearance that makes it a popular ornamental, with darker green waxy leaves, prickly edges and delicate white flowers in racemes. Its mature size is variable and depends mostly on pruning. Its smooth-shelled variety typically grows up to between 10 and 20 feet in height, while its rough-shelled variation can grow up to be as tall as 20 feet or higher.

Macadamia nut trees thrive in areas with full sun and regular waterings, with a well-drained, slightly acidic soil composition being ideal. Plant it in an area with plenty of space between other trees, with 15 feet between trees and 20 to 25 feet between rows. When planting your Macadamia nut tree, mix organic material and dirt in the hole you've dug that is twice the size of the pot the tree came in. Afterwards, make a ring around the tree to help retain water. Watering should be done fairly frequently for the first three months after planting, with the tree being drought tolerant once it is established. You can use a slow-release fertilizer that is low in phosphorus, such as one with a 9-0-5 composition, a few months later if desired. Pruning should be done for the first three or four years, with the removal of lower branches and suckers.

The Macadamia nut tree is also known for its edible fruits, which are encased in a leathery outer husk that splits upon maturity. The nuts, which are usually about half to one inch in diameter, have a deliciously unique flavor that can be enjoyed by roasting them and salting them or eating them fresh. They are a great source of healthy fats, proteins, as well as important vitamins and minerals. A single tree can produce up to 500 pounds of fruit over the span of multiple seasons - typically starting in September, peaking in December and ending in February.

Close species: Smooth-shelled Macadamia (Macadamia integrifolia), Rough-shelled Macadamia (Macadamia tetraphylla). Hybrid forms exist between the two species. Most popular Varieties: Arkin Papershell, Beaumont, Dana White.

Overall, the Macadamia nut tree is a unique and rewarding tree that is perfect for any tropical nut enthusiast! With its fascinating beauty, diversity and delicious golden nuts, it can truly make a statement in any green space and is an amazing addition to your garden.