Q. I notice many of my pine trees have lots of bright green-gray things growing on the trunks. Is it a virus? What is this? Is it harming my trees? What can I do to reduce or eliminate it? A. I am ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

Oak wilt is a fungal disease that kills oak trees, spreading through the roots of the interconnected trees. We are about to enter the prime susceptibility time of year (Feb. 1 through June 30), so ...

Moss and black spots, a stubborn type of lichen, give homeowners a headache when it comes to their patios as they cling tenaciously to surfaces, resisting even the most vigorous pressure washing ...

Algae, lichens and moss often form green or grey, powdery or mossy, crusty growths on the stems, branches and trunks of trees and shrubs. Pictured here, lichen and moss. This dreary "gray all day" ...

While patio slabs and tarmac are popular choices for driveways due to their sleek and appealing look, they can lose their freshness over time due to weather exposure. Tarmac, with its high moisture ...