Granex, Yellow Granex, Texas Grano, Superex Hybrid Vidalia Onion, Texas Onion, Texas Sweet Onion Maui Onion, Maui Sweet Onion, Kula Onion, Maui Kula Onion The following is a summary of Maui sweet onion characteristics. On the other hand, onions from other Hawaiian islands are better called “Maui” sweet onions (notice the quotes), Hawaiian sweet onions or simply sweet onions. These together with those grown outside of Hawaii are not considered authentic Maui onions. However, technically speaking, only onions raised on Maui island are considered Maui onions. Thus onions produced on Maui island are true Maui onions in name. In Hawaii, Maui Onion is commonly grown across most Hawaiian islands due to similarities in growing conditions that produce similarly sweet onions. A few more places in the world that produce similar types of onion are Vidalia, Georgia and Texas where there is the Texas sweet onion. The volcanic soils in Hawaii create the perfect conditions for sweet onions. Behind the scenes, this is how sweet onions such as the Maui onions are derived. Where there is no sulfur, the onion cannot produce the pungent burn. How it works is that onions absorb the sulfur in the soil in a complex chemical process that produces compounds which serve as effective repellents against insects and pests. The limited sulfur content in the soils of Maui island is responsible for producing this pungent free onion. Most soils around the world have sulfur in them and by default produce onions that have a burn and pungent odor ( see growing section). Maui onion is particularly special in taste and flavor owing to the conditions in which it is grown. The onion cultivar behind Maui onions is Granex, a hybrid onion variety. According to the University of Texas Extension, Granex is an F1 hybrid seed variety that was developed by USDA and the University and released in 1952. Geographical sources confirm that 75% of Maui Island is constituted by Haleakalā, has red soils and cool weather, elements that promote the production of Maui sweet onion. The onion is the equivalent of Vidalia onions which were first grown in the 1940s near Vidalia, Georgia in the United States.īotanically, Maui onion shares with other regular onions in the species Allium cepa and is a member of the amaryllis family ( Amaryllidaceae). Historically, Maui sweet onions have been cultivated on the volcanic slopes of Mt. Haleakalā. The Maui onion is a sweet and pungent free onion variety specifically grown on the Hawaiian island of Maui in the Pacific Ocean.
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