Product Q&A

Answer:

Gravex 20 EW Fungicide should be applied preventatively or at the first sign of disease on lawns and ornamentals, typically every 7–14 days during the growing season. It is most effective when applied in temperatures between 55-85°F, avoiding windy conditions and ensuring at least 24 hours of dry, rain-free time after application.  It is always best to contact your local extension office for optimal timing within your specific region. 
 
You can find your local Extension office here:
https://nifa.usda.gov/land-grant-colleges-and-universities-partner-website-directory
 

Answer last updated on: 02/13/2026

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