A tree that has looked fine for years starts thinning at the top. The leaves come in smaller, fall color shows up in August, and nothing obvious explains it. No pests, no disease, no stretch of...

A tree that looked healthy in early summer can look scorched and half bare after one stretch of triple-digit afternoons. Brown leaf edges, drooping branches, and a thinner canopy show up fast, and...

A long crack shows up in the trunk of the oak that shades your driveway, or a tree that stood straight for twenty years seems to tilt a little more after a windy week. Worry is a reasonable response....