UC Cooperative Extension Ventura County
669 County Square Dr. Suite 100
Ventura CA 93003
Our offices are currently closed due to the COVID-19 pandemic, and our team is telecommuting from home. We are available via phone and email.
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There are three viruses reported to infect hydrangea - Hydrangea Ring Spot V., Tomato Spotted Wilt V., and Hydrangea Latent V. Without doing some expensive laboratory testing, it is not possible to be specific as to which virus is present. All three viruses are present in California.