You would apply Bayer Advanced Disease Control for Roses, Flowers & Shrubs Concentrate at least 3 times per year, 7-14 days apart, beginning with Spring bud break.
Per the product label, the Bayer Advanced Disease Control for Roses, Flowers & Shrubs Concentrate should be applied using a Hand Pump Sprayer, Dial Style Hose End Sprayer or Water Hose End Sprayer. A watering can would not be able to apply the even coat and fine droplet size that is recommended for this application.
The Bio Advanced 3-in-1 Insect Disease & Mite Control Concentrate is the recommended alternative with the same methods of application. Please view the full product label for rates and application instructions.
Any mixed solution of Bayer Advanced Disease Control for Roses, Flowers & Shrubs Concentrate needs to be used within 24 hours.
Bayer Advanced Disease Control for Roses, Flowers & Shrubs is only labeled to be applied to the foliage. It will be absorbed through the leaves.