- Terrace. The strip between the sidewalk and the curb. Public right-of-way, so the tree in it belongs to the City.
- Right-of-way. Public land along a street. Where there is no sidewalk it can still reach 10 to 13 feet back from the pavement.
- Certified arborist. Someone who has passed the International Society of Arboriculture’s exam and keeps up continuing education. Wisconsin has no state license for tree work, so this credential and proof of insurance are what to check.
- ANSI A300. The national standard for pruning and other tree care. It rules out topping, flush cuts and spikes on living trees.
- Branch collar. The slightly swollen ring where a branch meets the trunk. A correct pruning cut sits just outside it, because that tissue seals the wound.
- Topping. Cutting a tree’s top or limbs back to stubs. It starves the tree, invites decay and produces weak regrowth. No good crew does it.
- Crown reduction. The correct way to make a tree smaller: shortening limbs back to side branches large enough to take over.
- Deadwood. Dead branches in a living crown. Removing them is the most common pruning visit and the one that does most for safety.
- Root flare. Where the trunk widens into the roots. It should be visible at ground level. Buried under soil or mulch, it rots.
- Tree cabling. Steel or synthetic cable installed high in a crown to support a weak fork. Specialist work, and sometimes the alternative to removal.
- Stump grinding. Chipping a stump away to below ground level, leaving the roots to decay. Different from stump removal, which takes the main roots out too.
- Root plate. The slab of roots and soil that lifts out of the ground when a tree blows over. Dangerous to cut near, because it can drop back into its hole.
- Oak wilt. A fungal tree disease, fatal to red oaks, spread by beetles to fresh wounds and through shared roots.
- Emerald ash borer. The beetle whose larvae have killed most of the Midwest’s untreated ash trees. In Madison since 2013.
How these guides are written
We are a tree service, not a law firm. Each guide sets out what the City of Madison and the State of Wisconsin publish, in the order a homeowner needs it, and links to the official page so you can check it yourself. Ordinances and phone numbers change, and when they do the official page wins. Where we are describing our own practice and not a rule, we say so. None of the guides put a number on any job; that depends on the tree, and a written estimate after a free visit is the only honest answer.
Outside Madison the rules differ from one community to the next. Our service areas page covers Fitchburg, Verona, Middleton, Monona, McFarland and Sun Prairie.