ArboRx is locally owned and operated in Fort Collins, Colorado, and specializes in keeping your trees and shrubs alive and healthy in an eco-friendly way. Our services are custom-tailored specifically for each property, so you get the most value and best service possible.

ArboRx Tree Care provides expert diagnosis of tree issues from pests, disease, nutritional deficiencies and improper watering, among others.

Lee Sonneville

Owner Operator

Lee Sonneville is a second-generation Arborist from Crystal Lake, IL, where he got his first experience in tree care working for the family business. He has also worked for the City of New York as both a City Gardener and a City Arborist before starting ArboRx in Fort Collins in 2011. He has been an ISA Certified Arborist for many years and is certified by the Colorado Department of Agriculture as a Qualified Supervisor for turf, rangeland, forest and ornamental pesticide application. In 2015 Lee completed the ISA’s Tree Risk Assessment Qualification program.


  • Colorado Licensed Pesticide Applicator #13737
  • ISA Certified Arborist NY-5412A
  • International Society of Arboriculture Tree Risk Assessment Qualified (TRAQ)
  • Colorado Qualified Supervisor #25829
  • ISA Rocky Mountain Chapter member #183502
  • Colorado Arborists and Lawn Care Professionals member

ArboRx Tree Care is a proud sponsor of Trees Water People, and the Rocky Mountain Raptor Program