I use Tree DoctoR_x quarterly to fertilize my olive trees. They have also pruned trees for me. They use a natural organic fertilizer that works really well. The experience has been wonderful. They were referred to me. They were very friendly and always showed up on time. They cleaned up after themselves and did a good job. They really know trees. They always sent me reminders each year.
-Sandra R.

Do you know if your Arborist is actually Certified?
Verify his/her certification by going to the following link: www.isa-arbor.com/certification/certification.aspx

Licensed Applicator?
Are you unsure about the people who are handling the pesticides around your home? Verity that they are a licensed applicator by going to the California Department of Pesticide Regulation: http://www.cdpr.ca.gov