The program that is chosen will depend on how long Dimension 2EW Herbcide lasts in the soil. For example, if Program 1 is done, it will provide 3-5 months of pre-emergent control. Most pre-emergent products will have to be applied at least twice a year to prevent Spring and Summer weeds.
For long term control though, you should apply a pre-emergent in the late fall and early spring which will prevent new crabgrass from coming up next year. If you apply pre-emergent every year, you should not have issues with crabgrass long term. Dimension 2EW is one of our most popular pre-emergents for crabgrass.
Dimension 2EW is one of our most popular pre-emergents for crabgrass as well as many other broadleaf weeds, and it can safely be used on St. Augustine grass. Please check the product label to ensure that it will control the other weeds that you are targeting.
Dimension 2 EW is a pre-emergent to stop the weeds from emerging from seed. This product will not kill dallisgrass but will prevent more from emerging in the lawn.
Dimension 2EW Herbicide should be applied when the soil temperature is at least 55 degrees Fahrenheit. This is generally done in early to mid March through the beginning of April depending on the temperature.
Dimension 2EW Herbicide does not stain but does have a mild odor.
After application of Dimension 2EW Herbicide, you can reseed 3-4 months after application. Per label:
The best time to apply Dimension 2EW Herbicide is after the ground is no longer frozen and before the soil temperatures reach 60 degrees.
Centipede is listed as a tolerant grass on the product label. Be sure to read and follow the directions on the Dimension 2EW product label for best results.
Pre-emergents like Dimension 2EW should be used before the weeds germinate in the fall time. We would recommend checking with a local master gardener in your area to give you an exact time. Here is the link:
http://www.csrees.usda.gov/Extension/
Please let us know if you have any additional questions.
Dimension 2EW Herbicide is a pre-emergent herbicide to prevent weeds from germintating so it will not kill existing quackgrass. Unfortunately, there is really nothing that can be done other than spot treating with a Roundup-type product.
Dimension 2EW is a pre-emergent herbicide, so it is best applied before soil temperatures reach those that are optimal for the weeds you are targeting. This is generally before soil temperatures reach 55 degrees in the spring. In the fall, you would want to apply before soil temperatures cool to those favorable for these weeds, usually below 70 degrees. We recommend contacting your local Cooperative Extension for the best recommendation on application timing in your area.
Yes, you will mix the amounts as specified on the label. It does not sound like a lot, but it is enough product to treat the area in at least two gallons of water.
We would not recommend Gallery 75 DF, as it's not labeled for Crabgrass or Poa annua. We would recommend to use Dimension 2EW Herbicide, it's labeled to help with pre-emergent control of Crabgrass, Spotted Spurge and Poa Annua, it's also safe to use on Bermudagrass (except on Tifgreen 328 hybrid), Zoysia and Tall Fescue. Dimension 2EW can also be used on landscaped ornamentals.
We would not recommend applying herbicides such as Dimension 2EW Herbicide during active precipitation or after rainfall. The manufacturer recommends to water this product in within 24 hours after application, so it would be best if you apply it the day before rain is expected again if you do not manually water the product in for pre-emergent applications.