“The leaves of my peonies are covered with what appears to be a white mold, with some of the leaves even turning brown already. What is this problem, and will it affect the plants next year? Should I ...

Peonies are a common sight in many yards. They are typically grown for their showy blooms in the spring but also have attractive foliage that can act as a backdrop in landscape beds. While peonies are ...

Q: Attached are photos of the peonies I care for at our church. To me, it looks like they have powdery mildew, which has happened the past three years or so. They’re on the east side, get plenty of ...

Garden peonies (Paeonia species) have been popular for many years. Whose grandmother didn’t have a row of peonies at the edge of the garden or somewhere in her yard? This perennial flowering plant ...

Do my creeping phlox need to be fertilized in the fall? If so, what kind should I use? In general, if the soil is good and healthy, there is no need to fertilize creeping phlox. If you feel the soil ...

Spring is the season when plants start growing again after being dormant for the winter. It is also the time of year when many disease organisms come out of dormancy to begin infecting plants. The ...

Pruning your peonies isn't difficult. “Simply prune off the dead leaves and cut back the stems so they're only a few inches ...

Peonies have been a favorite of gardeners for years. Native to Europe, Asia and the Northwestern United States, these large, deciduous shrubs with highly fragrant and gorgeous blooms make a beautiful ...

Fall is fast approaching and questions keep flooding in to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU Extension faculty and Master ...