Almost 70 years ago, John Swingle started his own tree surgery business that has grown into one of the most respected, innovative and comprehensive landscaping care service companies. Since 1947, Swingle has been Colorado’s local lawn and tree care experts. Swingle is an innovative organization on the cutting edge, with the latest technology and techniques for providing lawn, tree and landscape care. Each year, we receive an abundance of phone calls, notes, letters and emails from our customers thanking us for the quality of our work and praising our professional, courteous and knowledgeable staff.