Herbicides are a lot different than other concentrated products and can be hard to understand at first. The application rate depends on the the type of turf you have and how quickly you apply the product. You will need to read the product label to determine the correct usage rate for your needs (you did not give us any information about the type of lawn, region or application program you will be using so we cannot give you exact rates). The amount of water used to apply Dimension herbicide is not critical, but should be sufficient for uniform coverage of the target area. Calibrate by determining the volume of water required to treat 1,000 square feet. Use this calibration volume to determine the amount of water and Dimension herbicide needed to treat the target area (see the following calibration example). Note: Sprayer calibration (volume of spray needed to treat 1,000 square feet) will vary with each individual operator.
Steps in Calibration:
1. Mark an area of 1,000 square feet (i.e. 20 by 50 feet or 25 by 40 feet).
2. Place the sprayer on a level surface and add water noting the final level of water in the spray tank.
3. Spray the marked area with a sufficient volume of water to provide uniform coverage. Refill the sprayer to the same level as before measuring the amount of water added. The measured water added to the sprayer is the volume needed to cover 1,000 square feet.
4. Determine the application rate (0.073- .55 fl. oz./1,000 sq. ft.) for Dimension from the Recommendations section of this label.
5. To each volume of water used as measured in step 3, add the amount of Dimension as determined in step 4.
Example: If the sprayer uses 1 gallons of water to cover 1,000 square feet and the desired application rate of Dimension is .55 fluid oz./1,000 square feet, then you would add .55 fluid ounces of Dimension to every 1 gallon of water to be used."
You will need .75 - 3.0 pints of Dimension 2EW per acre. The exact amount you will need will be based on what region you are located in and what program you choose. Please refer to page 5 of the Dimension 2EW Herbicide Label for more specific information.
The dilution ratio of Dimension 2EW Herbicide is 0.28 - 0.73 oz. per 1,000 sq. ft. At the high rate, you will use 7 fl. oz. in a 25 gallon sprayer and 18.25 fl. oz. at the higher rate.
Yes, Dimension 2EW is safe to use on well established St. Augustine lawns. What season you need to begin applications and usage rate will depend on what you are treating. Pages 4 and 5 of the Dimension 2EW Herbicide Label gives you the 3 different options for treatments programs. As for discounts, we do run periodic specials and coupons which we email to our customers that have signed up to receive coupons from us and we always offer a low price guarantee and free shipping.
Dimension 2EW would be a great pre-emergent for established St. Augustine and Zoysia lawns. It is labeled for sedges, crabgrass and many other listed weeds. Please refer to the product label for specific application instructions.
Pre-emergents would be applied before soil temperatures reach 55 degrees as that is when crabgrass starts to germinate and you have to apply these types of products before the target weeds do so. There is not time restriction between using a post and pre and some are applied together if you have weeds at the same time you need to prevent others but a pre should be applied before a post to prevent in the first place. We do have general lawn care schedules here that can help. The best pre-emergent for crabgrass is anything that contains Dithiopyr as it also has very early post emergent control of crabgrass only if you do not get it down in time and it pops up. Once weeds have emerged you can use a product like Q4 for cool season turf applied when target weeds are actively growing as they only kill those weeds that are sprayed directly. Those please note: For use in California: Biotypes of large and smooth crabgrass in California have shown varied response to this product. If control failure occurs following a full or split application, DO NOT reapply this product. Change to a herbicide with a different mode of action.
Tenacity would be an option if you do have this issue.