"Thanks, never knew that!" Expert issues warning against troublesome landscaping practice: 'One of the worst things you can ...

The Los Angeles Times reported Sunday that Whittier’s Penn Park will be closed for an indefinite amount of time until an arborist can explain why the tree fell. Mayor Joe Vinatieri said the tree ...

A walk along the Gabrielino Trail with consulting arborist Alison Lancaster reveals a wealth of information about the trees of Los Angeles, including white alders, Torrey pines and coast live oaks ...

Here are some of the most common reasons for calling on an arborist. • Routine maintenance. Trees require regular care, and healthy trees add significant value to your property.

Registration for the certified arborist exam costs $170 for ISA members and $280 for nonmembers. Taking the exam via computer requires an additional $125 fee for all applicants.