Hi-Yield Weed and Grass Stopper with Dimension Herbicide - Questions & Answers

Hi-Yield Turf & Ornamental Weed and Grass Stopper contains dimension pre-emergent which provides superior control of crabgrass as well as control or suppression of other listed weeds when applied before they germinate. This will also provide post-emergent control of crabgrass only and is effective on crabgrass up to 4 to weeks after it has germinated and emerged.  A weed and feed product is fertilizer with either a pre-emergent or a post emergent mixed in with it. 

Hi-Yield Weed and Grass Stopper with Dimension Herbicide application rates vary according to what you are treating for and type of turf grass you have. Cool season grasses 2.4-9.2lbs per 1000sq. feet. Warm season grasses 3.5-9.2lbs per 1000sq. feet. 

Almost all fertilizers, herbicides, insecticides, etc have treatments in amounts of so much product per 1000 square feet.  So if you can figure out what your walking speed is then you know anytime you apply any product that calls for so much of it per 1000 square feet, you always set your spreader on this setting.  You can calibrate this by marking off a 1000 square foot (10 x 100) area and placing 4 ounces of any type of product of similar granule size, or of the extinguish in the spreader.  Start with a low setting and start walking your marked off area at a normal pace.  You can adjust as you go and find the basic setting for you to apply the product over a 1000 square feet. 

Yes, Hi-Yield Weed and Grass Stopper with Dimension Herbicide is a good choice for preventing crabgrass in tall fescue. You will need to wait at least 12 weeks after application before reseeding. 

Yes, Hi-Yield Weed and Grass Stopper with Dimension Herbicide is labeled to prevent sandbur. 

Keep in mind that Hi-Yield Weed and Grass Stopper with Dimension Herbicide cannot be applied in areas where you are going to plant anything edible.  It can stay in the soil for up to 4-6 months. If you are looking to prevent weed growth in an area where edibles are planted, you would want to use Monterey Vegetable and Ornamental Weeder after you have planted.

Hi-Yield Weed and Grass Stopper with Dimension Herbicide is generally applied in spring and fall depending on your region and what weeds you are targeting.  Per the product label: Do not apply more than 9.2 lb of this product per 1,000 sq. ft. per application and no more than 27.6 lb of this product/1000 sq. ft. per year (equivalent to 0.5 and 1.5 lb of active ingredient (ai) per acre, respectively).  It would be a good idea to contact your local cooperative extension office for advice on the best times to apply in your area.  

Hi-Yield Weed and Grass Stopper with Dimension Herbicide can be applied from late summer through early fall (late August through November). When applied in the fall, a sequential or second application of this product must be made the following spring to provide season-long control of crabgrass. We would recommend contacting your local extension office for the exact best time to apply this product in your area. This product is only a pre-emergent product that prevents weeds from germinating. It will not kill any actively growing weeds. 

Hi-Yield Weed and Grass Stopper with Dimension Herbicide can only be applied around established ornamentals.  If applied over newly planted bulbs, or newly established plantings, it can prohibit growth.  

Hi-Yield Weed and Grass Stopper with Dimension Herbicide does not harm anything actively growing. It is used only to prevent the listed weeds from growing in the applied area.

Ferti-Lome Winterizer and Weed Preventer II For Southern Grasses already contains dithiopyr which is the active ingredient in Hi-Yield Weed and Grass Stopper with Dimension Herbicide.  There is no reason or benefit to using both so you would just use the Winterizer for the added benefit of the nutrients.

Hi-Yield Weed and Grass Stopper with Dimension Herbicide is safe to apply to ryegrass.

Hi-Yield Weed and Grass Stopper with Dimension Herbicide is not a restricted product and can be shipped to California. 

You will need to wait at least 12 weeks after application of Hi-Yield Weed and Grass Stopper with Dimension Herbicide before reseeding. 

You can use another herbicide at the same as using a pre-emergent such as Hi-Yield Weed and Grass Stopper with Dimension as long as you are following the product labels for what you are using. If you are putting down a post-emergent at the same time as your pre-emergent, then you will want to delay watering-in the pre-emergent for at least a day so that you do not wash away the post-emergent. (The Hi-Yield with Dimension must be watered in to be activated.) Most 2,4-D products will control dandelion, but that active ingredient will not kill nutsedge or poa annua. If you would like to tell us what type of turfgrass you have, then we can recommend products to kill these weeds.

If you plan to overseed you would want to wait until the seed has come up and been mowed at least twice or wait at least 4-6 weeks (whichever comes first) before putting down an application of Hi Yield with Dimension. Normally seeding and pre emergents cannot be used in the same season due to the timing needed for each being so close together. 

Certainty will kill actively growing poa and is safe on Bermuda as directed. Hi-Yield Weed and Grass Stopper with Dimension Herbicide can be applied to established turf as directed in the fall for a pre-emergent application. 

 Hi-Yield Weed & Grass Stopper with Dimension will not kill existing poa annua. It is a fantastic product and one of many we carry that would do a great job of preventing poa annua germination when applied at the right time. It can be hard to get rid of poa annua in lawns with a post-emergent, depending on what kind of turfgrass you may have. If you want to let us know what turf you have we can see if we have a post-emergent product that would work for you.