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 2EW which contains dithiopyr is labeled for use on carpetgrass.
Dimension 2EW is labeled to control poa annua (annual bluegrass) before it emerges and should do a good job when applied at the right time. Please refer to the product label for complete instructions. If you are already dealing with Poa Annua, you will need to use a post-emergent, and we do carry several. Which you choose depends on your grass type. Certainty is a good choice, but please refer to the label to ensure it can be used on your lawn type.
Dimension 2 EW and Pendimethalin are labeled to prevent many of the same weeds, so we would recommend choosing the product that best fits your needs rather than making unnecessary applications. If you have specific questions about which pre-emergent would be best for your situation, you may reach our Customer Service team at 866-581-7378 M-F 9a-5p.
Dimension 2EW is safe for pets when used correctly. You would want to keep pets out of the treated area while you perform your application and allow it to dry completely. Once fully dry, it is safe for pets to re-enter the treated area.
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.
We would not recommend applying herbicides such as Dimension 2EW Herbicide during active precipitation. Instead, you could use a higher volume of water, or you could irrigate the application yourself with at least 1/2 inch of water.
Both Dimension and Gallery are great pre-emergents and are OK for use around non-bearing vineyards only. We do not currently carry any pre-emergents that can be used around bearing vineyards.
Buffalograss is listed on the Dimension 2EW Herbicide product label as tolerable with a note: Do not use this product on seedling buffalograss in the spring of the first year of establishment until the turfgrass is fully green and has established new roots. 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.