A: As a tree gets older, the woody tissue of the trunk and limbs divides into two zones: heartwood and sapwood. Heartwood cells usually contain tannins or other substances that make it dark ...

is a dark, foul-smelling and unsightly seepage of sap from tree trunks. The disease is not usually a serious problem but the appearance can be alarming. Slime flux is caused by common ...

The root flares (or trunk flares) of the trees should be dramatically exposed, not just barely exposed. The dark area used to be covered with soil, hiding girdling roots that need to be removed ...

In summer, sun scald is due to the excessive action of the sun’s rays; in winter, by the great variation in temperature that can occur on the side of a tree trunk exposed to the sun in cold weather.

Fall color is incredible, ranging from red and orange to dark ... trunk. This leads to excessive breakage. Use the recommended cultivars above for better landscape management. Prune the trees ...