Tree of heaven is highly invasive and incredibly difficult to eradicate. Learn how to control ailanthus and manage its unchecked spread.

Botanist Rosario Velasco, part of the Andalucian Network of Botanical and Mycological Gardens in Natural Spaces, discovered ...

Matt Mattia used both hands to flip through the branch at his eye level, studying each side of every leaf as sunlight filtered from above.

Trees can add beauty and value to a home landscape — if you plant the right species and find the right spot for it. Here are ...