You will get fruit with only one plant. It is difficult to predict when the market would become saturated, says Christie. 5. In the case of the macadamia flower, they're quite small so we need a small insect, and the staff here are using native bees. Macadamia trees commonly grow to 18 metres (60 feet) high and 15 metres (49 feet) wide. There are many cultivars of macadamia nuts out there, but here’s a few of the most common. And finally, nuts ripen at different times, requiring multiple harvests. There are many varieties of fruiting Macadamia nut trees. M. integrifolia ‘Dorado’ originated in Hawaii and has an upright growth habit and medium height. The flowering macadamia trees originated in northeastern Australia and take 7 to 10 years to begin producing nuts. And if you are planting nursery stock that is well underway, get it into the ground as soon as possible after purchase. Macadamia seeds should be planted indoors during the late fall to early winter. Usually a “heritage” tree is used, like the ‘Hinde H2.’. Grow them in a pot, but change the potting mix every couple of years. You may need to repot it in the future to give it more space. This shell is about five times harder than a hazelnut to crack, and has a whole host of uses on its own. And what will your friends say, when you share your gourmet stash with them?! Today, as the result of further advances in classification, there are just four species in the Macadamia genus: M. tetraphylla, the rough-shelled macadamia, a commercially-grown crop that doesn’t always have a rough shell, and has sweet nuts. The most crucial requirement for macadamia, especially in the sapling stage, is abundant water that drains well. Few trees need root pruning or trimming due to a bent tap root. Wind protection is essential while nuts are forming, or they may drop prematurely. However, its nuts are poisonous and thus it’s usually not cultivated. This is a self-pollinating tree that does not produce “true” from seed. With pruning, some are quite suitable for deep pots. They’re also used in pit barbecuing, as the burning shells don’t add any unpleasant flavors to the food. The time to start thinking about planting that seed you’ve overwintered, or a nursery seedling, cutting, or rootstock, is in January. After the first year, you only need to water the tree once a week. Grafting in Macadamia is more difficult than in most nut trees due to hardness of wood. Prune trees that don’t self-harvest (drop fruit), and those planted in containers, to a manageable height. Phosphorus is indeed P, not K. This correction will be made asap. Since then, the Hawaiian macadamia nut has become an internationally acclaimed delicacy. If the trunk is damaged by a weed whacker or other injury, it can develop cankering. It has a growth habit that’s more upright than spreading. They also prefer a slightly acidic pH of 5.0-6.5. When growing macadamia trees, the ideal growing zones are between 9-11. How to Make White Chocolate Macadamia Nut Cookies Do not plant them deeper than they previously were, as this can cause trunk rot. Place your potted seed on a seed-warming tray, or in a sunny window. Remove the outer husks and place nuts on a screen no more than two deep. Fruit Trees > Nut Trees > Macadamia Nut Tree > Macadamia Bush Nut This was the first Australian native food plant to be grown by non-indigenous Australians as a commercial crop. The Macadamia Tree might outlive you! Trees are spaced at 23 ft x 13 ft (or 125 trees/acre) at maturity, nut yields peak at 150 lbs of in-shell nuts/tree. Great article. Apply manure a minimum of once a year, as robust healthy trees can guarantee you the simplest quality and amount. A fish emulsion or citrus mix is best, applied per package instructions, usually in fall and winter. Do you want to know how to fertilize nut trees? 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