there are 17 essential elements that trees require. a mixture of 10-10-10
is just N-P-K. What about Fe, B, Mg, Mn, N and so on?


Sincerely,
John A. Keslick, Jr.
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.