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…

Watering winterized roses

Hello, I keep seeing that potted roses still need to be watered in winter if they dry out? I am wondering a few things and am hoping I might get a answer here: 1) Is the snow not enough to…

Dahlia flower buds with brown spots

My dahlia buds all seem to have brown spots and when they open the brown spots appear large and not pretty. The plants are 3 feet tall, have healthy stems and leaves, get a full 8 hours of sun.  I…