Tree Learning Center

Sims Tree Learning Center was established in 1996

by Gary and Susan Sims, owners of Sims Tree Health

Specialists, Inc. Since it's opening, Sims TLC has

become a staple in the nature education world by

hosting events for various garden clubs, educational

classes, and workshops. 


Features of the gardens include one of the largest

Palm gardens in the Inland Empire, the Joe Casey

Memorial Cactus and Succulent Garden, and a fruit

Orchard. With a 4,000 square foot museum that

includes antique cars, tools, insect collections, and

biological collections, you can visit Sims TLC as

many times as you want and still come out learning

something new!


Hooded Orioles, Tortoises, Tarantulas, and many other wildlife species make their home among the gardens. 


In 2011, we began the TLC Wildlife Aware program, which teaches garden lovers and tree care industry workers about the laws and regulations surrounding the wildlife species living in the areas that are worked on everyday. To learn more about TLC Wildlife Aware, click here.  


All tours are free and should be made by appointment. Gardens are open Monday through Friday between 9:00am and 4:00pm. 

About TLC

Oroville Botanic Garden & Education Center

Check out the Oroville Botanic Gardens & Education Center at or email

(More photos coming soon to the gardens page!)

"951's Resident Tree Expert..."
951 Magazine spotlights Sims Tree
Learning Center. Click the photo
to read the article.

"Arborists turn love for trees into education..."

In October  2006, The Press Enterprise highlighted Sims and their dedication to tree preservation and education through TLC. Click on the photo to view the article. 

Awards and Recognition

Susan Sims was inducted into the Green Industry Hall of Fame in May 2015 for work at Sims Tree Learning Center.

"What is important to the Sims is evident at the Tree Learning Center..."

Tree Services Magazine featured Sims and their commitment to the holistic healing of trees. The method is constantly researched at Sims TLC. Click on the photo to view the article.