Author

Jon Dukes

In Sacramento, California, Jon Dukes writes on plant health for Biology Insights. An Extension Master Gardener with 26 years of horticulture experience, he spent decades managing pest diagnosis in commercial nurseries. Dukes continues to staff a weekly county diagnostic clinic, identifying tree diseases and garden pests for local residents.

Common Cosmos Problems and How to Fix Them
Common Begonia Fungus Disease and How to Fix It
Why Are My Crocosmia Leaves Turning Brown?
Why Is My Black-Eyed Susan Wilting?
Common Streptocarpus Problems and How to Handle Them
What Does Overwatered Lavender Look Like?
How to Save a Dying Hydrangea Plant
Yellow Coneflower Leaves: Causes and How to Fix Them
How to Get Rid of Fungus on Roses
Common Problems With Rudbeckia and How to Fix Them
Is My Azalea Dead? How to Tell and What to Do
Why Are My Vincas Dying? Common Causes and Solutions
Common Begonia Pests and How to Get Rid of Them
Why Are My Coneflowers Turning Black?
Common Black-Eyed Susan Problems and How to Fix Them
Should I Cut Back Peonies With Powdery Mildew?
How to Treat Brown Spots on Rose Leaves
Why Are My Mandevilla Leaves Turning Yellow?
Why Is My Hydrangea Wilting After Planting?
Why Are My Hydrangea Leaves Turning Red?
Why Do My Hibiscus Buds Fall Off?
Why Are My Marigolds Not Blooming?
Why Are My Hydrangea Leaves Curling?
Why Are My Azaleas Turning Brown and Dying?
What Do Overwatered Begonias Look Like?
What to Do If Your Bougainvillea Is Not Flowering
Why Are My Dahlia Leaves Curling?
Why Is My Hibiscus Dying? A Step-by-Step Diagnostic
Why Are There No Leaves on My Roses?
Why Are My Petunias Sticky?