Caring for trees and plants from the ground up

Sanctuary Tree PHC is dedicated to tree and plant health care. We specialize in the preservation of trees and shrubs by nurturing trees through proper nutrition. 

Certified and Licensed

  • Licensed and Insured Urban Forestry. ISA Certified Arborist #RM-7446A
  • Colorado Applicator License #14383
  • Serving Metro Denver. Est. 2005

Did you Know?

80% of landscape problems are due to soil issues

The name Colorado comes from the Spanish word “color rojo,” meaning “the color red”, which refers to the red dominant soils in our landscape.  The red is a result of the high iron content within the soil.  And yet, Colorado’s highly calcareous soils tie up the iron in a form unavailable to trees, shrubs and plants.

High soil pH can also negatively affect plant growth. pH can be described as the measure of acidity or alkalinity of soil and is measured on a scale of 1 to 14 where 7, which is neutral, is the optimal level for most plants. Numbers lower than 7 are considered acidic and numbers higher than 7 are considered alkaline or calcareous (high in calcium carbonate). Colorado soils that have never had amendments added may have a pH value of up to 8.5, which is higher than most plants can tolerate — especially acid-loving trees such as maples.

brown rock formation under blue sky during daytime

Best service

With 24 five-star ratings on Yelp, Sanctuary Tree stands as a testament to unwavering dedication and top-tier service, consistently exceeding the expectations of our cherished clientele.

Well Experienced

Boasting 18 years of dedicated service, Sanctuary Tree’s extensive experience stands as a beacon of expertise and trust in the realm of tree care and preservation.

Educate and Empower

Knowledge is the key to a vibrant garden.

At Sanctuary Tree, we’ve tailored our educational services for homeowners and small business owners like you. Our educational services are designed to foster a deeper understanding of tree health, soil dynamics, and pest management. Whether you’re battling fungal issues, curious about soil pH, or aiming to become a certified arborist, Sanctuary Tree is here to guide and educate.

  • Tree Health Workshops: Delve deep into the biology and care of trees.
  • Insect Pest Management Seminars: Understand, prevent, and manage pesky intruders.
  • Combating Fungal Issues: Recognize, treat, and prevent harmful fungi in your garden.
  • Soil pH Testing: Get to know your soil better, ensuring the perfect balance for growth.
  • ISA Certified Arborist Exam Prep: Aim high with expert guidance and comprehensive resources.


call to ask a question

(303) 910-1663

Our Services

Sanctuary Tree PHC Services

We believe in proactive tree and shrub care to preserve the aesthetics of your landscape, maintain the health of your green assets, and enhance your property’s value. Trust us to provide the expertise, quality, and commitment your trees and shrubs deserve.


Emerald Ash Borer (EAB), a non-native insect, was found in Boulder, CO in 2013. Since then it has spread to Longmont, Lyons, Broomfield, Lafayette and Arvada. EAB attacks all types of Ash trees (except mountain ash). Trunk injection provides 24 month protection against EAB.


Nutrient/Fertilizer applications help trees obtain nutrients that are difficult for most species of trees to get from our Rocky Mountain soils. Balanced nutrition can prolong the life of a tree, help resist pests and disease and help tolerate drought.


Leaf and Bark Beetles are one of the top tree pests in Colorado. Treatments vary depending on type of tree and pest associated. Elm leaf beetles are an example of leaf damaging beetles.


Winter watering of trees is essential for keeping trees healthy during our typical winter dry spells from November through March.

New Client Assessments And Existing Return Clients:

Why we charge for assessments and diagnosis of tree disease.

My name is Ryan and I am an experienced disease specialist with an honest approach to tree care and I do not sell unnecessary services that are so often seen with ‘Free Estimates’. My approach to a healthy tree is to educate you, as the steward of that tree, in all the things you can do to promote good tree health. There are times when I will recommend services, but ultimately it is through education that I help you understand your landscape needs and the best management practices to improve the health of your living landscape.

Ryan Bartlett

Trunk Injection: The Future of Tree Protection

The innovative trunk injection method revolutionizes tree insect and pest control. By injecting directly into the trunk, the formulation is rapidly absorbed and spread throughout the tree, ensuring optimal protection. With over a decade of rigorous research and development, the techniques used, backed by superior equipment and formulations, stand out as the gold standard in safeguarding trees against pests.

  • Efficient and User-Friendly: The drill-plug-inject procedure is straightforward and fast. While it is suitable for avid DIY enthusiasts, the best results often come from professional execution, especially for more complex challenges.
  • Eco-Conscious Approach: The method of direct tree injection is designed to minimize environmental impact, safeguarding families, applicators, and the surrounding areas from potential hazards.
  • Economically Savvy: Utilizing modernized equipment and formulating costs efficiently offers significant value. This cost-effective solution benefits both homeowners and service providers by maximizing advantages without compromising on quality.

Our Testimonies

Years in the business

Celebrating 18 Years of Green Expertise

For a decade and a half, Sanctuary Tree has been the trusted partner in safeguarding and nurturing nature’s wonders. From the majestic ash trees to the delicate shrubs, our commitment has grown as deep as the roots we care for. Through years of dedicated service, we’ve not only cultivated gardens but also enduring relationships. Here’s to the past 18 years of greener horizons, and many more to come. Cheers to growing together! 🌳🌿🎉

Trees Serviced

7500 Trees and Counting!

At Sanctuary Tree, each tree holds a special story. Over our journey, we’ve tenderly serviced, nurtured, and pruned 7500 of these living monuments. With every branch trimmed and every root nourished, we’ve strived to amplify nature’s beauty and ensure longevity. Each tree is a testament to our dedication and love for nature’s giants. Celebrate with us as we honor these 7500 symbols of growth and resilience. 🌳🍃🌟

We Take Care Of Your Trees and Shrubs & Keep Them Looking Great Day By Day

Call to book an appointment

(303) 910-1663

Blog Posts

Let us take care of your Trees & Shrubs