S.P. McClenahan
Arboriculturists since 1911
1 Arastradero Road, Portola Valley, CA 94028
(650) 326-8781
Services
Tree Care
Plant Health Care
Consultation
Symptoms & Solutions
Sudden Oak Death
Disease Symptoms
Insect Problems
Hazard Tree Risk Assessment
Pruning Standards
Frequently Asked Questions
Risk Management
Quality • Integrity • Confidence
Tree Care Professionals
Safety & Health
Hazard Tree Risk Assessment
Published Articles
In the News
Current Events
Press Releases
Published Articles
Community Relations
Company Info
History
Industry Involvement
Mission Statement
Management Team
Code of Ethics
Services
Employment
Contact Us
Schedule Appointment
Tree Care
Our Arborists prune and shape trees and shrubs with health, safety and artistic considerations in mind. We prune to emphasize a tree’s natural shape. If a tree must be removed, our expert professionals can safely take it down...
More >
Plant Health Care
Our Plant Health Care program utilizes an integrated approach to tree and shrub care, from roots to shoots. This program consists of scheduled diagnostic inspections that enable us to detect and treat problems before they damage plants.
More >
Consultation
McClenahan Companies offers the following consulting and diagnostic services: Hazard tree evaluations, plant problem diagnosis and solutions, tree protection planning and supervision for construction sites, fertilization recommendations...
More >
Sudden Oak Death: The Facts As We Know Them
What’s eating my oak tree?
© 2018 S.P. McClenahan