Bonide Weed Beater Complete is labeled to suppress lawn burweed as a post-emergent, but not sandbur/sandspur. So you first need to determine exactly which plant(s) you are targeting since these will require different active ingredients.
If you need a product labeled to control lawn burweed, you may use a product such as Fertilome Weed Free Zone instead. Please be sure to review the product label for more information, complete application instructions, and to be sure your grass type will be tolerable.If you are targeting sandbur/sandspur, then we need to know the kind of turgrass you have to know if there is a product that will work as a selective post-emergent for you.
You may use a pre emergent such as Pendulum 2G Herbicide to prevent both sandbur and lawn burweed from coming up in the future. You may view the full product label here.
For post-emergent control, it is best to treat weeds in the spring before temperatures reach 80 degrees or higher. St. Augustine turf may discolor leaf surfaces but will recover with new growth and mowing. Please refer to the Bonide Weed Beater Complete label for full application instructions.
Unfortunately we do not have the spreader settings for that specific combo and the manufacturer does not list that spreader on their bag. Due to the thousands of granules on the market and just as many different types of spreaders, you will want to calibrate your spreader to the product you are using and its application rates.
You can view our How to Calibrate your Spreader video on how to accomplish this below.
Bonide Weed Beater Complete can be applied to a newly seed lawn once it has been fully established, typically after being mowed at least 2-3 times or 30 days, whichever is longer. Unfortunately, we do not have the spreader settings for that specific combo and the manufacturer does not list that spreader on their bag. Due to the thousands of granules on the market and just as many different types of spreaders, you will want to calibrate your spreader to the product you are using and its application rates. You can see a short video on how to accomplish this below.
How to Calibrate your Spreader
Bonide Weed Beater Complete is a granule product that needs to be put down dry.
Bonide Weed Beater Ultra is applied at the rate of 1.5-2.4 oz. per gallon of water per 1000 sq. ft. for cool-season grasses or 0.75-1.8 oz. per gallon of water per 1000 sq. ft. for warm-season grasses. The manufacturer recommends using a hand-pump or backpack sprayer to apply to ensure the most accurate application.
Bonide Weed Beater Complete should not harm any trees, but we do recommend staying outside of the dripline.
Since the product contains a post emergent ingredient, whether you can apply Bonide Weed Beater Complete after another post emergent product application really depends on which other herbicide you are using. In general herbicides applications do have a repeat treatment time that could be 2 weeks or 30 days or longer.
