Turf Mark Blue Spray Indicator Dye - 1 Quart Prodiamine Specticle FLO is the best

Specticle FLO is the best option for preventing annual bluegrass (Poa annua) in your warm season lawns like Bermudagrass

Rainfall does not affect the effectiveness

Visible results in 15 minutes

and ornamentals

Turf Mark Blue Spray Indicator Dye - 1 Quart Prodiamine Specticle FLO is the bestNeed help seeing where you've sprayed herbicide, insecticide or fungicide? Then grab a bottle of TurfMark Blue spray indicator dye. TurfMark adds a subtle blue hue to your lawn making it easy to get even spray coverage. Helps prevent product over under application for better results No permanent staining of sidewalks or driveways Mixes easily with fertilizer, herbicide, and insecticide One bottle covers 64,000 square feet