Mauna Loa Macadamia Nuts Corporation, headquartered in Irvine, California, with a processing facility in Hilo, Hawaii, is the world’s largest processor and marketer of macadamia nut products. Named after the largest active volcano globally, Mauna Loa oversees orchards spanning 10,000 acres on the Big Island of Hawaii.

Growing Conditions and Harvesting
The macadamia tree is delicate, characterized by shallow roots that make it susceptible to high winds. To protect these fragile trees, they are often surrounded by pine trees that act as a windbreak. These trees are carefully bred to thrive in the various microclimates of the Big Island, helping mitigate risks associated with excessive rainfall or drought. Due to the genetic instability of macadamia seedlings, commercial trees are typically created by grafting onto rootstock in nurseries, where they mature for two years before being planted in orchards. It takes about twelve years for these trees to yield nuts at a commercial level.
Mature mauna loa macadamia nuts naturally drop from the trees and are harvested five times during the season, which runs from mid-August to March. Interestingly, while the trees are fragile, the macadamia nut itself is the hardest nut in the world, requiring 300 pounds of pressure per square inch to crack its shell. The extensive processes of drying, separating, and dry roasting contribute significantly to the higher price of these mauna loa macadamia nuts. Mauna Loa offers a range of products, including salted and unsalted dry-roasted macadamias, honey-roasted variants, and various confections featuring chocolate-covered macadamias, candy-coated nuts, fruit and nut mixes, macadamia candy bars, and cookies.
The History of Mauna Loa
Founded in 1976, Mauna Loa Macadamia Nuts Corporation was a subsidiary of C. Brewer and Company Ltd., which initially focused on sugar plantations. In the early 1970s, C. Brewer began diversifying its operations due to the declining profitability of sugar. In 1973, they acquired Castle & Cooke’s macadamia orchard and processing plant, which was generating approximately $4 million annually. This acquisition led to the establishment of the Mauna Loa brand.
In 1976, C. Brewer started converting five sugar plantations to macadamia cultivation, planting 1,000 acres each year. During the late 1970s, Mauna Loa funded its expansion by selling off its orchards in smaller parcels to private investors while retaining the right to purchase the nuts produced under long-term contracts.
With the decline of sugar as a cash crop, many Hawaiian farmers believed macadamia nuts could fill the economic gap. However, these nuts were primarily seen as a delicacy enjoyed by visitors to Hawaii. Consequently, mainland consumers often purchased macadamia nuts as a souvenir of their travels. Despite being the leading producer, Mauna Loa faced stiff competition from other Hawaiian growers and nuts imported from South America and beyond.
To expand its market, Mauna Loa began advertising on the mainland in the early 1980s and relocated its marketing division to Los Angeles in 1984, establishing distribution centers in major cities such as Los Angeles, Chicago, Atlanta, and New York. The company also tapped into the Japanese market by signing a distribution agreement with Suntory, Ltd.
In 1985, Mauna Loa opened a 10,000-square-foot chocolate factory, enabling it to enhance the value of substandard nuts by creating candy products. This strategy not only helped boost profits but also broadened the appeal of macadamia nuts. Mauna Loa continued its initiative of selling small orchard parcels to real estate investors, further financing its growth and the conversion of former sugar land to macadamia cultivation.

The Story of Mauna Loa Macadamia Nuts
In the mid-1980s, IU International Corporation, the parent company of C. Brewer, made the decision to spin off its Hawaiian operations. John “Doc” Buyers, the CEO who had successfully revitalized the business a decade earlier, was offered the chance to lead the new venture. However, due to significant financial losses in 1985 and an overwhelming debt burden, IU was unable to pursue the spin-off. Rather than risk a change in ownership, Buyers gathered a group of investors to form Buyco, Inc., which successfully acquired C. Brewer, including the Mauna Loa brand.
A crucial aspect of financing this acquisition was the sale of macadamia orchards. Buyers launched a master limited partnership, Mauna Loa Macadamia Partners, packaging over 2,400 acres of macadamia nut orchards, which helped raise approximately $35 million of the total $207 million needed for the purchase. Buyco also secured a management contract to farm, process, and sell the nuts produced by these orchards.
Where Nutrition Meets Deliciousness
Mauna Loa macadamia nuts are often hailed as a superfood. Packed with monounsaturated fats, these nuts are a heart-healthy snack option. When compared to other popular nuts like almonds and cashews, macadamias are higher in total fat and lower in protein. They also offer a source of antioxidants and omega-3 fatty acids, making them a nutritious choice for any diet.
The dry-roasted Mauna Loa macadamia nuts deliver a delightful taste of the islands, providing a well-rounded snack that is both delicious and wholesome.
Grown Eco-Friendly on Mauna Loa’s Slopes
The fertile soils of the Mauna Loa volcano are where the Mauna Loa Macadamia Nut Corporation began its journey in 1946. The nuts were first commercially cultivated on a large scale in Hawaii after seeds from Australia were introduced to complement the region’s coffee production.
From the outset, the company has prioritized sustainability and land stewardship. Mauna Loa macadamia nuts are cultivated using only rainwater, making them one of the most sustainable nut varieties available. The entire nut is utilized: the shells are burned in a way that minimizes particulate matter emissions, while plant husks enrich the local soil.
With 2,916 solar panels providing 85% of the electricity and burning macadamia nut shells providing the remaining 15%, the Mauna Loa plant is now completely powered by renewable sources.
The Mauna Loa Macadamia Nut Corporation continues to thrive, roasting the beloved crunchy and buttery macadamia nuts that make for a delicious snack or a nutritious addition to your daily meals. Experience the goodness of Mauna Loa macadamia nuts and enjoy a taste of Hawaii with every bite!
Mauna Loa Macadamia Nuts: A Shareable Snack from the Big Island
From classic dry-roasted macadamia nuts to indulgent chocolate-covered varieties, the Mauna Loa Macadamia Nut Corporation offers a treat for every palate. If you’re planning a visit to the Big Island, don’t miss the chance to explore the newly remodeled visitor center at Mauna Loa Macadamia Nut Corporation. Simply drive along the Hawaii Belt Road to 16-701 Macadamia Road, Keaʻau, HI, and look out for the updated logo along the way!
Our Big Island Bed & Breakfast is just a short 30-minute drive from this delicious destination. Stay at our boutique hotel in Volcano and savor the heart-healthy goodness of Mauna Loa macadamia nuts!

About Mauna Loa Macadamia Nut Corporation
Established in 1976, the Mauna Loa brand has grown to become the world’s largest processor of macadamia nut products. The processing plant operates at an impressive scale, handling about 180,000 pounds of nuts in the shell every day and packaging around 48,000 pounds of nut kernels.
In addition to their delicious products, the Mauna Loa Macadamia Nut Corporation is committed to sustainability. Their Hilo processing facility is powered primarily by a 1.2 MW solar farm, which meets approximately 85% of their energy needs. The remaining 15% is sourced from burning macadamia waste products, utilizing steam generated by the nut drying process. These renewable energy initiatives now supply 100% of the facility’s electric needs, eliminating reliance on traditional energy sources.
Visitor Experience at Mauna Loa Macadamia Nut Corporation
A visit to the Mauna Loa Macadamia Nut Corporation’s flagship location offers a delightful experience, complete with free samples of macadamia nuts in various flavors. Guests can watch employees preparing the nuts while an informative video explains the production process. The visitor center was recently updated and reopened in September 2022, now featuring products from Hawaiian Host alongside Mauna Loa MacNuts.
Honest Reflections on the Experience
While the experience is enjoyable, some visitors feel that the attraction could offer more. Currently, the gift shop sells a variety of flavored nuts at prices higher than local grocery stores. Although free samples and ice cream are available, and there is a video showcasing the history and processing of macadamia nuts, some guests believe additional educational opportunities—such as a guided tour through the orchards—could enhance the experience.
For those heading towards Volcanoes National Park, the Mauna Loa visitor center is worth a quick stop. If the assembly line is open, you can see it in action, view the informative video about nut processing, and stroll through the lovely tropical garden behind the center. The friendly staff is always ready to assist and provide samples, ensuring visitors leave with a taste of Hawaii.
While macadamia nuts can be pricey, the shop is a charming stop where you can learn about the nut’s journey from tree to snack and appreciate the scenic rows of macadamia trees lining the approach to the visitor center. Experience the unique flavor and quality of Mauna Loa macadamia nuts, a true gem from the Big Island!
Conclusion
In conclusion, a visit to the Mauna Loa Macadamia Nut Corporation is a delightful experience for anyone on the Big Island. With its extensive range of products, commitment to sustainability, and engaging visitor center, it offers a unique opportunity to learn about and savor the delicious Mauna Loa macadamia nuts. Whether you’re sampling different flavors or enjoying the scenic views, this destination provides a tasty glimpse into Hawaii’s rich agricultural heritage. While some visitors may wish for more interactive experiences, the charm and quality of Mauna Loa macadamia nuts make it a worthwhile stop for travelers looking to enjoy a true taste of the islands.
FAQs about Mauna Loa Macadamia Nuts
1. What types of products does Mauna Loa Macadamia Nut Corporation offer? Mauna Loa offers a variety of products, including dry-roasted macadamia nuts, chocolate-covered macadamias, honey-roasted nuts, and flavored varieties. They also produce macadamia nut confections and snacks.
2. Where is the Mauna Loa Macadamia Nut Corporation located?
The main processing facility and visitor center are located in Hilo, Hawaii, at 16-701 Macadamia Road, Keaʻau, HI.
3. What are the health benefits of Mauna Loa macadamia nuts?
Mauna Loa macadamia nuts are rich in monounsaturated fats, antioxidants, and omega-3 fatty acids, making them a heart-healthy snack option.
4. Can I visit the Mauna Loa visitor center?
Yes, the visitor center is open to the public and offers free samples of macadamia nuts, as well as educational videos about the nut processing. For information on hours and any upcoming events, visit their website.
5. How are Mauna Loa macadamia nuts produced?
The company grows macadamia nuts on their orchards, processes them at their facility, and uses renewable energy sources, including solar power, to minimize their environmental impact.
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