Ken from Long Island, Ny writes
Propiconazole 14.3 does not list hydrangeas as a tolerable plant species specifically on the product label. We would recommend using Bonide INFUSE Systemic Disease Control on hydrangeas as they are a species of shrub. You would mix 1 Tablespoon (½ fl. oz.) per gallon of water and apply every 14-28 days.
Answer last updated on: 08/10/2018