Help, my plant is covered in a white, powdery fungus! What do I do?” First, don’t panic. While powdery mildew may not look ...

Powdery mildew is common plant disease that can quickly make a mess of your roses. It shows up as a dusty white coating on ...

“Powdery mildew tends to thrive in areas of poor air movement that have high humidity during the evening hours and are dry a bit during the day, in a moderate temperature range, usually between ...

Powdery mildew really isn’t something you want to mess with, because not only can it harm the plant its on, but it can spread to others in your garden and infect them too.

Powdery mildew can affect many other plants including lilacs, phlox and beebalm. A beebalm patch in my home garden has lost all its leaves due to powdery mildew.

Poor air circulation favors mildew, so don’t crowd plants too closely together, she said. If a shrub is a dense tangle of stems, prune it this winter to open it up for better airflow.

Powdery mildew appears as superficial growth on plant surfaces and is seen as white to gray powdery spots, blotches or felt-like mats on leaves, stems, and buds.

Powdery mildew fungi produce and disperse spores into the air in spring when temperatures rise above 60 degrees. Infections occur when spores reach a suitable host.

Powdery mildew can spread pretty fast since it only takes about 48 hours for a newly germinated fungal spore to be able to start producing new spores.

Q. Is there any way you could help in figuring out what is wrong with our lilac? – C.B. via email. A. Lilacs are quite susceptible to a fungal disease called powdery mildew, which causes a ...

Powdery mildew is a fungus that makes leaves look like they’re covered in white powder. Left untreated it will quickly dry leaves out and make a plant ugly and desiccated.