What is an avocado Avocado trees flourished already 50 million years ago in Central America and its fruits are considered as one of the best gifts of Mother Nature. The first species to discover the magic of avocados was the dinosaur. The avocado is an evergreen fruit tree. It grows only in subtropical climates and can become 12 to 20 meters tall. The fruit is not sweet, but fatty, is strongly flavoured, and has a smooth, almost creamy texture. The taste of avocados can differ substantially, depending on the oil content of the individual fruit. In Vietnam, traders classify avocado into the following three categories which based on their oil contents: