Powdery Mildew in Seattle Greenhouse: Copper Spray and Host Specificity

Beginner greenhouse gardener in Seattle: powdery mildew on green beans. Not overwatered, increased ventilation, using Serenade spray. Worried about spread to other veggies.

Key Points

• Powdery mildew is host-specific—may not spread to different species
• Copper spray is traditional treatment for this fungus
• Check Gardens Alive for greenhouse fungicides

Note

Expert normally doesn't address plant diseases (see profile), but this general info may help.