Olive Tree Facts

Olive Tree Facts
Olive Tree Facts (Image: Image © 2000 Alexis Vega-Singer; All Rights Reserved.)

The silvery leaves of the olive tree reflect a long and beautiful history in Western culture. From the Bible, to mythology, to today's dinner table, the olive plays a large role.

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History

The olive tree is one of the oldest cultivated plants. Olives were one of the seven species found in Israel in Biblical times (as mentioned in Deuteronomy 8:8). They are also mentioned many times in Ancient Greek literature. According to Greek myth, the olive tree was a gift from the goddess Athena to the city of Athens. This sacred olive tree lived in the Erechtheum, a temple on the Acropolis.

Features

The olive tree (Olea europaea) is an evergreen tree or shrub with silvery-green, oblong leaves. It can grow up to 50 feet tall, but can be kept pruned to a more moderate height of about 20 feet for easier harvesting. The fruit of the olive tree is a drupe (the flesh surrounds the stone, which itself surrounds the seed), and some varieties can grow to an inch long. The fruit varies in color from green to purple to black, depending on the variety, when it is harvested and how it is processed.

Geography

In the United States, olive trees are grown commercially in California and Hawaii. However, you can grow olive trees in your garden in USDA zones 8--10, where there are hot, dry summers and mild winters. The best locations for growing olive trees, however, surround the Mediterranean basin. Greece, Italy and Spain are the largest producers of olives for domestic use and export. North African countries such as Morocco and Tunisia, and Middle Eastern countries such as Syria and Lebanon are also big producers.

Harvesting

Harvesting can be done by hand or mechanically. Hand-picking the olives from the tree into a basket allows the fragile fruit to avoid bruising, but is labor-intensive and wasteful, as the highest branches may not be reachable. Most common is the process of shaking the olives off the branches onto a net or blanket spread around the base of the tree. A mechanical shaker can be used to shake the entire tree at once. Straddle or side comb harvesters can also be used, but may damage the fruit.

Fun Facts

In Ancient Greece, a person could be fined for digging up too many olive trees, even on their own land. At the games at Olympia, a wreath of olive leaves was the prize.

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