Most Texas property owners spend between $250 and $1,500 to treat a single oak for oak wilt — but the right number for your tree depends on size, disease stage, and how many other oaks need protection. This guide breaks down what drives oak wilt treatment cost in the Dallas–Fort Worth metroplex, what’s included in a typical quote, and how to avoid the most common ways homeowners end up overpaying.
What you actually pay for in oak wilt treatment
The single biggest cost driver is the volume of macro-infusion fungicide (typically Alamo® propiconazole) required to saturate the tree’s vascular system. That volume is calculated from the tree’s diameter at breast height, or DBH. A 12-inch DBH live oak might take 60–90 minutes and a few hundred dollars of product; a 36-inch heritage oak takes the better part of a day and several times the fungicide.
A complete quote covers four things: licensed arborist labor, the propiconazole itself, equipment time (pressurized injection canisters and tees), and a follow-up inspection visit. Reputable Texas treatment companies do not charge for the initial diagnosis or consultation.
Cost ranges by tree size in DFW
- Small oak (6–12″ DBH): $250–$450 per tree
- Medium oak (12–20″ DBH): $450–$800 per tree
- Large oak (20–30″ DBH): $800–$1,200 per tree
- Heritage live oak (30″+ DBH): $1,200–$1,500+ per tree
These ranges apply to single trees. Properties with multiple oaks often qualify for multi-tree discounts, and groves with shared root systems are sometimes priced as a single treatment zone.
Preventive vs. therapeutic: a real cost difference
Preventive injections in a healthy oak typically use a lower fungicide volume and last about 24 months. Therapeutic injections in an actively infected tree use more product (to overwhelm the established fungus), often need to be repeated annually for 2 to 3 years, and the tree may still lose canopy along the way. Catching oak wilt early can cut your lifetime treatment cost in half or more — which is why our free property walk-through is the highest-leverage 30 minutes you can spend if you suspect a problem.
What doesn’t justify the cost
Two pitches we hear weekly: (1) cheap “root drench” treatments — these do not deliver propiconazole through the xylem and have a near-zero success rate against oak wilt; (2) untrained “tree injection” services using consumer hand-pump kits with the wrong fungicide. Both can cost more in the long run because they delay correct treatment until the tree is too far gone to save. Texas A&M, the ISA, and the TCIA all recommend pressurized macro-infusion only.
Get an exact quote (free)
The number you actually pay depends on what we see when we walk your property. Our ISA Certified Arborists will measure your trees, check for spread risk to neighboring oaks, and give you a written quote on the spot — no charge and no obligation. Call (817) 799-7808 or request a consultation online.