We also noticed a 3-foot-tall shagbark hickory that was holding onto its leaves, which can occur in younger trees. My sister’s Japanese maple is awash with brown curly leaves, even in February.

Leaves offer insights into nature’s intricate balance and the essential role trees play in our ecosystem. Leaves indicate environmental health by their color, spots, blemishes, wilting and curling.

A black oak tree can be identified by its bark and leaves. The bark is typically dark blackish or brownish grey, and the leaves are green with lobes that have bristles at the tips. This guide will ...

Oak wilt’s onset can be confused with other more common issues, such as drought stress, leaf loss from spongy-moth caterpillars, and diseases such as anthracnose and bacterial leaf scorch.

Agriculture officials in Marin County are alerting property owners and arborists to be on the lookout for a tiny invasive ...

Among the most alarming are Bacterial Leaf Scorch (BLS) and Oak Wilt, both of which can kill oak trees. “Most of the time, oak wilt is vectored or carried from tree to tree by insects.

Artist Clare Hewitt uses fallen oak leaves and sunlight to create her works of art before returning the leaves to the forest ...