Why planting cypress trees in the graveyards?

According to the tradition, cyparissus was a handsome young man from Kea, son of Τήλεφου and grandson of Hercules…
It was a favorite of Apollo, but Zephyr. His companion was a tame sacred deer. One summer day, while the deer was lying in the sun, cyparissos mistakenly killed it with a javelin.
The young man was in despair, wanted to die. He asked the sky as a favor to flow the tears of the eternal. The ancient Greek myth of Κυπάρισσου grieving the dead deer. Apollo tried in vain to dissuade him favourite Am, but he’s inconsolable, he wanted to end his life. God spared the sore new and decided to relieve it of its misery.
So she turned him into a cypress tree from which the eternal will come out the mournful tears like drops. The bodkin point cypress which was thrust in the sky, I was reminded of the spear with which he died the sacred deer. The ancient Greeks, in a sign of mourning, they hung sprigs of cypress out of doors after the death of a loved one. Also, adorned with the bodies of their dead, or burned on the funeral piles….
The cypress tree has roots in the ancient Greek myths, but became part of the christian tradition. In Panagia Μεσοσπορίτισσα in the Marathon there is and the hagiography, the Saint Socrates! Nothing is a coincidence. It was here that the great battle of Marathon and someone wanted to honor and Socrates. The man who preached the first a God and put to death on the charge of atheism thing.
The christian tradition
The cypress tree was considered a funereal tree and has been planted in cemeteries until now. Orthodox Christians, due to the shape, consider that it connects the earth with the sky and help the souls to ascend to heaven”. In the Village there is the famous cypress tree which was planted by Th. Kolokotronis in memory of his brother, Yannis, was killed in the area.
In fact, many argue that the cypress (Cupressus sempervirens) eliminate undesirable scents, and this is necessary in the cemeteries. But probably the truth is located in the root of the system: the cypress, irrespective of soil and climate has πασσαλώδες and deep root system, without lies, and to lift off the ground and so does not affect the burial sites.