The righteous shall flourish like the palm tree: he shall grow like a cedar in Lebanon. Those that be planted in the house of the Lord shall flourish in the courts of our God. They shall still bring forth fruit in old age; they shall be fat and flourishing [green]; Psalm 92:12-14
"The palm tree to which these verses refer is well known in the east. The palm has a perfectly straight trunk that grows to a height of 80 to 90 feet. Although it is so tall, the palm is never toppled over by heavy winds. The root system is so strong that, no matter how much the tree sways in a storm, it is never uprooted. Once the winds die down, the tree returns to being stately and tall. Also, the fruit of the palm tree is edible year round; it is always fruitful. [NOTE: This palm is not to be confused with the coconut palm, which most of us are familiar with.]
The analogy is very clear! The righteous are as straight and tall as a palm, with no kinks or crookedness. They cannot be uprooted, even by the strongest forces. And finally, the righteous are always fruitful. If we live our lives as righteous believers, we can be just like the palm tree."
from Light Through an Eastern Window by Bishop K. C. Pillai.