Tag Archives: Powdery mildew

Hanging begonia – mildew

The leaves of red hanging begonia have mildew on them. It is not producing the flowers it should. Is there a solution I can use to restore the plant back to health?…

Leaf mold on phlox divaricata

Hi! I’ve so appreciated your expertise on the challenges of trying to attract pollinators to my container garden. Every year (because of budget restraints) I try a few recommended native plants, hoping they can survive the winds and light challenges…

Cactus turned orange

I’ve had this cactus sitting in direct sunlight by a large west facing window for 2 years. I water about once per month. At the beginning it was entirely green but slowly it has accumulated this orange/white powdery looking substance…

Powdery mildew on ornamental plants

Characteristics of powdery mildew  Powdery mildew is a common fungal disease that infects a broad spectrum of plants, including trees and shrubs, perennials, grasses, fruits and vegetables. It is not a single disease but is caused by a group of…

Maple tree fungus

I have a city tree (planted 4 years ago(?)) that had had a fungal infection for the last three years. Year by year the tree looks worse. How can I get the city to replace with an appropriate tree. I…

Coreopsis disease

Hi, I had planted native plant Coreopsis lanceolata this spring. It developed some disease so the leaves became kind of gray/white. The new growth did not have that color, but most of the leaves did. It still bloomed well. Is…

Powdery mildew on Hydrangea

Hi. I am a beginner in gardening. I recently purchased the hydrangea in the picture, and some white powder-like markings appear on its leaves. I suspect that those are mildew, and had used Safer’s 3 in 1 Garden Spray Fungicide…

Powdery Mildew on potted indoor Rosemary plant

Good morning. I live in Toronto and have a 3-4 year old potted rosemary that I have been successfully overwintering indoors. Right now though, it is rapidly getting overcome by powdery mildew- worse at the top- and it needs immediate…

Damaged serviceberry branch

Hello – Thank you for reading my question. I was hoping for your advice regarding this Downy serviceberry branch that I realize we should have wrapped when it was first damaged during some construction. It’s now a black gash and…