Archive for the ‘Powdery Mildew’ Category

Spring – Summer Care of Herbaceous Peonies After Flowering

Summer weather can be tough on the foliage of tree and herbaceous peonies tree (P. lactiflora). Here are some tips to ensure your peony plants will prosper for many years to come. Keep foliage disease-free and prune off all badly infected with mildew or black spotted.  Some varieties naturally shed their leaves (go dormant) early. Itoh hybrids and most […]

‘Cherokee Brave’– Outstanding “Red” Flowering Dogwood

Flowering dogwood (Cornus florida) is the most beautiful of U.S. native flowering trees (USDA hardiness zones 5 to 9). It typically grows 15-30 feet tall, but larger forms are known. The tree is broadly-pyramidal at a young age, branching is low, and matures with a rounded canopy. Spring bloom time usually overlaps with redbud (Cercis […]

Preventing Powdery Mildew Disease On Summer Plants

Powdery mildews are serious fungal leaf diseases infecting many garden plants. Each one is host specific. The powdery mildew that attacks summer phlox does not infect zinnias or pumpkin vines. Powdery mildew disease on crape myrtles does not attack lilacs or roses. In recent years new powdery mildew diseases have popped up on dogwoods and […]