If you take a close look at some of the more established trees in your landscape, you may notice something you cannot seem to describe – it may look to you like a kind of fungus on your tree trunk. Is ...

Q: I recently noticed a black, tar-like patch on my tree trunk, though it’s not tacky like actual tar. Are these insect eggs? Dried sap? Do I try to scrape it off? The tree has lichen but I don’t ...

An interesting amber-colored mushroom is showing up in many gardens. It’s actually kind of pretty, but it’s scaring some folks, especially when tree care companies and arborists report that it is ...

Q: Mushrooms suddenly appeared on my tree’s trunk. How can I treat them to protect the tree? A: Unfortunately, you can’t treat mushrooms growing out of wood, and the fungal growth that produced them ...

Mushrooms commonly grow in lawns and gardens; you've likely seen mushrooms cropping up on your lawn after a long period of rain. Mushrooms are the visible fruiting bodies of fungi. They provide an ...

The gardening season is rolling and if you’ve got questions, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU Extension faculty and ...

Q: I have a pine tree on the edge of my lawn that has clusters of mushrooms coming up around the base of the trunk. My friend told me these mushrooms are a sign that the tree has rotting roots and the ...

Rainy weather can cause mushrooms to sprout in lawns and mulch. “That’s fine,” said Sharon Yiesla, plant knowledge specialist at The Morton Arboretum in Lisle. “What’s not fine is when you see ...