Again I repeat. The non-water absorbing roots are most of the time in the
upper four inches of soil. Watering deeper than that is not of value.

--
Sincerely,
John A. Keslick, Jr.
Consulting Arborist
http://home.ccil.org/~treeman
and www.treedictionary.com
Beware of so-called tree experts who do not understand tree biology.
Storms, fires, floods, earthquakes, and volcanic eruptions keep reminding us
that we are not the boss.


"Sheldon" wrote in message
ups.com...
On Sep 24, 2:37?pm, "W. Watson" wrote:
Isn't it true though that deeper roots add strength to the tree, that is,
hold it firmer in winds?

Less water, not more, is what encourages stronger root systems. Deep
watering of trees should only be done during extended periods of very
short water supply... and then no more than twice a growing season.
If a tree needs deep watering more often then that type of tree should
not have been planted there. Over watering is far more damaging to
trees than the occasional shortage.