It is not recommended to apply herbicides such as Barricade 4FL Pre-Emergent Herbicide (Prodiamine) with hose-end sprayers like the Ortho Dial N Spray Hose End Sprayer, as they do not necessarily distribute an accurate rate of product.
It is recommended to use a Hand Pump Sprayer or a Backpack Sprayer for herbicide applications, in order to ensure proper use rates.
Please refer to page 13 of the manufacturer's product label for rates specific to your grass type, and use as directed.
A hose end sprayer is not recommended for applying Barricade 4FL Pre-Emergent Herbicide (Prodiamine) as this type of sprayer is hard to regulate the water volume being used. Herbicides are much different than other chemicals because water just acts as the carrier and each applicator may use a different volume of water for their treatment areas.
The product label states to apply 0.23 - 1.1 oz per 1,000 sq ft in a sufficient water volume to cover each 1000 sq ft area depending on your type fo turfgrass.
Please read the product label to determine the exact usage rate for your needs as it varies according to the species of grass you have and view our How to Calibrate Your Sprayer Video for a demonstration if needed.
Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is a flowable liquid so does stay suspended in liquid better than the Prodiamine 65 WDG which is water dispersible granules which do not actually dissolve.
You should still agitate the sprayer during application for consistent suspension while applying.
It is not recommended to apply herbicides such as Barricade 4FL Pre-Emergent Herbicide (Prodiamine) with hose-end sprayers as they do not necessarily distribute an accurate rate of product.
Instead, it is recommended to use a Hand Pump Sprayer or a Backpack Sprayer for herbicide applications, in order to ensure proper use rates. Please refer to page 13 of the manufacturer's product label for rates specific to your grass type, and use as directed.
Depending on how compact the granite is, Barricade 4FL Pre-Emergent Herbicide (Prodiamine) should work. You want to ensure you are using enough water so that the product can penetrate through the granite & reach the soil where the weeds are.
Please view the full product label for more information.
Although the manufacturer's product label does not mention staining, Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is a yellow liquid, which could possibly stain certain materials.
We would suggest doing a small spot test in an inconspicuous area before spraying over your pavers.
We would not recommend using Barricade 4FL Pre-Emergent Herbicide (Prodiamine) in a hose-end sprayer as it is difficult to get the proper coverage and water volume needed and proper mix ratio.
It is recommended to use pressurized handpump sprayers, backpack sprayers or large capacity sprayers to ensure you are getting the best even coverage using a sufficient volume of water to evenly apply the product at the recommended rate per 1000 sq ft. Please view the product label for application rates and more information.
Barricade 4FL Pre-Emergent Herbicide (Prodiamine) is not labeled to prevent wild violets from coming up.
We don't have any pre-emergents that are labeled to help control Wild Violets, it is best treated with a post emergent when it just starts to emerge.
