Whether you're an established macadamia farmer or considering your first planting, understanding the numbers behind the crop is essential. Here are some key insights from our experience growing Beaumont macadamias in Chipinge, Zimbabwe.
Tree Productivity
A mature Beaumont macadamia tree can produce around 20 to 25 kilograms (44 to 55 pounds) of nuts in husk per year. This varies depending on the age of the tree, growing conditions, and management practices. Trees typically begin bearing meaningful crops from around year five, with production increasing steadily as the tree matures.
Nut Weights and Composition
A single macadamia nut in its husk weighs approximately 15 to 20 grams (0.5 to 0.7 ounces). The husk can account for up to 50% of the total weight. Once dehusked, a wet nut in shell typically weighs 6 to 12 grams (0.2 to 0.4 ounces), depending on the variety and growing conditions.
The Drying Process
After harvest, nuts must be carefully dried to reduce their moisture content. A wet macadamia nut in shell can lose around 30% to 40% of its weight during drying. For example, a 10-gram wet nut will dry down to approximately 6-7 grams. The drying process directly affects both quality and flavour — proper techniques and conditions are essential to ensure the nuts are dried thoroughly without compromising their delicate taste.
These numbers are averages from our experience and will vary depending on local conditions, variety, and management. But they provide a useful baseline for anyone planning a macadamia investment.