How to start a plant health care program at a tree service.

Step 1: License first

Every state requires a commercial pesticide applicator license to apply anything for hire, and most put trees under an Ornamental and Turf (or Ornamental and Shade Tree) category. The path is a core exam plus the category exam, a fee, and in some states a period as a registered technician under a licensed applicator before you can test. Budget four to ten weeks. Licenses are per person, so the tech who will do the work needs one, and the business usually needs a separate business license or registration on top.

Rules by state are on the applicator license guide. Two things people miss: continuing education units to keep the license, and record-keeping requirements that start on the first application.

Step 2: Pick the first five services

The PHC Rx default service list has eleven types. Nobody starts with all eleven. The five that cover most of what walks in the door at a tree service:

• Trunk injection: emerald ash borer, oak wilt, Dutch elm, bacterial leaf scorch. Highest margin, longest interval.
• Soil drench or soil injection: systemic insecticides for scale, adelgid, borers on smaller trees. Annual.
• Dormant oil: scale and mites on everything, applied while the tree is leafless. Easiest sell in the industry.
• Foliar spray: bagworms, Japanese beetle, fungal leaf diseases. Timing-sensitive, so the calendar matters.
• Deep root fertilization: the service clients ask for by name. Pair it with a soil test so you are not guessing.

Step 4: One rig, one tech

A dedicated PHC truck comes later. For the first season most companies run a 100- to 200-gallon skid sprayer on an existing pickup, a trunk injection kit (Arborjet QUIK-jet or a Rainbow macro-infusion setup), a backpack sprayer, a soil injection probe, and the PPE the labels require. A purpose-built workstation like the [Mobile Tree Spa MTS-180](https://mobiletreespa.com) makes sense once the route fills a truck.

Pick the tech now. The person with the license, the patience for measuring DBH on every tree, and the habit of writing things down. The program is that person for the first year.

Step 6: The paperwork nobody warns you about

• The label is the law. Host on label, pest on label, rate, method, timing, reapplication interval, REI. Read it before the first job and check it on every job.
• Application records: date, site, product, EPA number, rate, amount, target, applicator, weather. Most states want them kept two to three years. What to record and how the app keeps it.
• Restricted entry intervals and posting requirements on commercial and school properties.
• Insurance: tell your carrier you are applying pesticides. Some general liability policies exclude it.

Step 7: Sell it to clients you already have

Every removal you have done in the last three years was at a property with other trees. Every pruning client has a tree they worry about. That list is the first season of PHC. The pitch is a diagnosis on the tree they already asked about, with a written plan and a price. Approval rates on a written prescription with a confidence rating and a reason run well ahead of a line item that says "treatment".

Municipal and HOA work comes later, usually after you have a season of records and a TRA credential on the team. Those clients ask for the paperwork first.

What a good first year looks like

Thirty to sixty properties on a program. One tech with a full route April through June and a lighter one the rest of the year. A file for every treated tree with the diagnosis, the rate, and the label check. And a list of retreat dates for next spring that came from this year's applications, not from memory. That last item is the difference between a program and a series of jobs.

One open question worth sitting with before you start: do you want PHC to be a department, or the business? Companies that answer "the business" tend to buy the rig and the software in year one. Companies that answer "a department" tend to do better starting on the pickup.