National Arborists

Homeowner Information

Find a Tree Service

What is an ISA Certified Arborist?

Protecting Trees During Construction

Organic Tree Care Information

Shop our Tree Care Supply Store

Information for Tree Services & Arborists

Arborist Training Information & Certification Programs

Advertise your Tree Service Company on this site. Bestsellers 




National Arborists
Your online resource for local tree service companies & tree care information.

National Arborists on Facebook National Arborists Google+ National Arborists on YouTube National Arborists on Twitter
Home  > Local Tree Care Services  > California, CA  > Los-Angeles County CA

6111 Appaloosa Ave.
Riverside, CA 92509


[email protected]

Please feel free to fill out the form below to have a Sims representative contact you, or if you prefer, give the toll free number above a call.

Sims Tree Health Specialists provides tree service to all of Los Angeles County including the communities of:
  • Acton, CA
  • Agoura Hills, CA
  • Altadena, CA
  • Arcadia, CA
  • Avalon, CA
  • Beverly Hills, CA
  • Bradbury, CA
  • Brentwood, CA
  • Burbank, CA
  • Calabasas, CA
  • Cerritos, CA
  • Claremont, CA
  • Covina, CA
  • Culver City, CA
  • Diamond Bar, CA
  • Duarte, CA
  • El Segundo, CA
  • Glendale, CA
  • Glendora, CA
  • Granite Hills, CA
  • Hacienda Heights, CA
  • Hermosa Beach, CA
  • Hidden Hills, CA
  • La Canada Flintridge, CA
  • La Crescenta, CA
  • La Habra Heights, CA

In addition to spraying trees to control tree diseases we offer tree spraying to control fruit production on ornamental Olive trees.
Tree spraying arborists

Citrus Tree Spraying

Backyard citrus trees are common throughout the Malibu area. Several insect and disease pests target citrus trees. Some of these insect and disease pests can cause low quality citrus fruit or even lead to the decline of your citrus trees. We can help with common problems with citrus trees in Malibu, such as, Peach Leaf Curl, Scale Insects, Aphids, and Asian Citrus Psyllid which can cause Citrus Greening Disease.

Tree & Shrub Fertilization

A comprehensive tree health program often includes tree fertilization. Trees in an urban environment like Palos Verdes Estates face many more stress factors than their woodland relatives. Trees planted in low quality urban soils often benefit from the addition of extra nutrients in the form of tree fertilization. After a thorough inspection of your trees and shrubs our arborists can recommend a complete tree maintenance program that may include tree fertilization for some or all of your landscape plants.

Tree Diagnosis & Tree Consultation

A proper tree preservation and tree maintenance plan begins with a diagnosis of the current condition of your trees and shrubs. Our tree maintenance recommendations are customized because they are based on the particular trees and shrubs on your property. High maintenance trees may require tree spraying or feeding every time we visit, while other trees may require little or no extra care in order to thrive. Our arborists will take the time to discuss and care for special trees on your property.

Tree fertilizing in Marina del Rey
Consulting arborist in Manhattan Beach, CA

Certified Arborists on staff


Sims Tree Health Specialists has been protecting, preserving, and curing sick trees since 1972. Our tree service can offer expert advice from ISA Certified Arborists on all your tree care needs, questions, and concerns. Whether you need tree spraying, tree consultation, tree diagnosis, or insect & disease control, Sims can help.
Consulting arborist

Our tree service staff includes:
•An ISA Board Certified Master Arborist
•A California Certified Urban Forester
•2 California Licensed Agricultural Advisors
•6 California Licensed Structural Operators
•8 California Licensed Agricultural Applicators
•9 ISA Certified Arborists
•10 Certified Wildlife Protectors

Sims Tree Health Specialists is proud to be affiliated with the following tree service, tree care, & green industry organizations:
•International Society of Arboriculture
•Street Tree Seminar
•Inland Urban Forestry Council
•California Oak Foundation
•American Horticultural Society
•Palm Society of Southern California
•American Public Garden Association
•LA Mycological Society
•Arbor Day Foundation

Tree disease identification
Sims Tree Health Specialists offers a variety of tree care maintenance services to cure sick trees and keep your landscape trees healthy, such as:
•Insect pest control for trees & shrubs
•Tree disease diagnosis & control treatments
•Citrus tree spraying
•Tree & shrub fertilization
•Tree diagnosis & tree consultation
•Pre & post construction care for trees

Insect Pest Control For Trees & Shrubs

Both native insect pests and invasive insects thrive in the mild climate of Rolling Hills. Keeping landscape trees and shrubs healthy often means applying insect control treatments. Sims Tree Health Specialists accomplishes this with tree spraying, soil insecticide injections, and tree trunk injections. For certain insect and mites pests we offer certified organic insect and mite control treatments. Our arborists and tree specialists are familiar with the insect pests commonly found in Rolling Hills and can help you control:

•Aphid Insects
•Asian Citrus Psyllid
•Leaf Eating Caterpillars
•Leafminer Insects
•Lerp Psyllid Insects
•Scale Insects
•Spider Mites
•Tree Borer Insects

Considering the high cost of landscaping and landscape plants in Rolling Hills it is more cost efficient to protect your existing trees and shrubs rather than buy new plants.

Tree Disease Diagnosis & Control Treatments

Even the manicured landscapes of Hidden Hills can be susceptible to a number of plant-damaging tree diseases. The professional arborists at Sims Tree Health Specialists can diagnosis the tree diseases found in Hidden Hills and provide a tree disease spray program to keep your trees healthy. Our tree service helps homeowners in Hidden Hills control the following common tree diseases:

•Apple Scab
•Citrus Greening Disease
•Oleander Leaf Scorch
•Palm Tree Diseases
•Peach Leaf Curl
•Pierce’s Disease
•Pitch Canker
•Powdery Mildew
•Sudden Oak Death
•Xylella fastidiosa

Girdling tree root repair in Palos Verdes Estates

Palm tree spraying in La Cańada Flintridge

Pre & Post Construction Care For Trees

Trees are often negatively affected by construction activities. The biggest impact from construction is due to tree root damage. Soil compaction, disposal of caustic materials in the root zone, piling soil over root systems, and trenching are common construction activities that damage tree roots. Consulting with our arborists before construction begins can avoid all of these tree-damaging conditions. Even when pre-construction care is neglected, we can still save many construction damaged trees if immediate action is taken. Caring for trees in construction areas may include:

•Mulching over root systems to prevent soil compaction
•Providing a tree survey before construction begins
•Tree preservation plans for historic trees, protected trees, or heritage trees
•Root zone aeration with our air spade
•Monitoring trees during construction
•Providing insect or disease control treatments
•Supplemental tree watering during construction
•Radial trenching to encourage tree root development
•Restoring the soil grade over tree root zones
•Soil injecting root stimulants, beneficial fungi, or bacteria to improve root growth
•Vertical mulching to reduce soil compaction & incorporate organic matter into the soil


Glendale, CA

As part of their insect eradication program, state agriculture officials are increasing education efforts regarding the Asian Citrus Psyllid. The Asian Citrus Psyllid was first found in Glendale in 2009.

The Asian Citrus Psyllid doesn’t harm citrus trees by feeding on them; rather it has the potential to transmit a deadly tree disease called Citrus Greening Disease. So far no cure has been developed for Citrus Greening Disease.

California agriculture officials are asking homeowners to inspect their citrus trees at least once per month to look for the Asian Citrus Psyllid. Tree inspections can be done whenever watering or pruning citrus trees. Homeowners should be especially vigilant when their citrus trees are putting out new growth, as the Asian Citrus Psyllid prefers to feed on the new citrus leaves.

Homeowners can report any Asian Citrus Psyllid infestations to the California Department of Agriculture’s exotic-pest hotline at 800-491-1899.


Official PayPal Seal 


[Home] [Contact Us] [Terms of Service] [Privacy Policy] [About Us] [sitemap]

Copyright  2014  Crosscut Marketing Services LLC