Cashew trees produce cashew nuts not as isolated seeds but as appendages to larger fruits, according to the Republic of South Africa's Department of Agriculture, Forestry and Fisheries. When the nuts fall from the tree, they take root and grow into new cashew trees.
Cashew trees typically grow to heights of around 39 feet. These trees produce fruits called cashew apples. The C-shaped cashew nut, also called the seed, grows out of the lower part of the apple. Its soft inner section contains plentiful amounts of vitamins C and B1.
Cashew trees must grow for three years before producing nuts. The nuts ripen about two months after the tree blossoms, a process that begins in November and extends through January. The ripened nuts then fall to the ground, where they germinate.
For a cashew tree to grow well and produce nuts it must have favorable growing conditions. The trees grow best in warm or tropical climates, though they can also withstand the occasional drought. The nuts must land on moist soil before they can produce new cashew trees.
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