Helpful Links Regarding Pesticides:
How to Use & When to Apply:
Greenview Weed & Feed with Crabgrass Preventer has 3 separate components in one bag.
1. Fertilizer: This product includes a 24-0-6 fertilizer which has both quick and slow release actions to green up your lawn for up to 12 weeks. The theory with this product is that the herbicides will take care of the weeds and the fertilizer will help the grass grow into the places where the weeds were. The lack of competition from the weeds along with the boost from fertilizer will help to create a dense, thick turf.
2. Broadleaf Weed Killer: Includes a mix of several broadleaf weed killers (2, 4-D and Dicamba) that will kill broadleaf weeds such as dandelion, plantain, and others without killing your lawn grass.
3. Crabgrass Preventer: Active ingredient Dimension will stop crabgrass before it germinates and grows. Essentially, it puts down a chemical barrier on your lawn to stop seeds of crabgrass, annual grassy weeds, and a few broadleaf species too.
Because it does 3 things at once, timing is very important when you are applying this product. Let’s first talk about the proper timing for each of these components individually and then together as a whole.
1. Fertilizer: Does not require much thought. If you are applying the product at the correct time to control broadleaf weeds and crabgrass, it will be OK to apply the fertilizer.
2. Broadleaf Weed Killer: Needs to be applied when broadleaf weeds are actively growing. Some gardeners make the mistake of applying broadleaf herbicides too early when weeds are small. You won’t want to wait TOO long (because of the crabgrass element) but you also need the broadleaf weeds to have plenty of leaf surface in order to absorb the product.
Unlike the fertilizer and crabgrass components, it is not OK to apply if the broadleaf herbicide granules fall to the ground. They do not work in the soil. To avoid this issue, simply apply when the grass is slightly moist–usually early to mid morning is a great time because of the morning dew. This helps the product stick to the leaves of the broadleaf weeds, which is necessary for the herbicide to work.
3. Crabgrass Preventer:
Dimension (Dithiopyr) is the active ingredient in Greenview Weed & Feed with Crabgrass Preventer. This product works as a preventative herbicide that puts down a chemical barrier which stops seeds from germinating. Although it’s marketed as a crabgrass preventer, it also prevents other annual grassy weed seeds and a short list of broadleaf weed seeds as well.
Since it is a pre-emergent chemical, it must be used before crabgrass starts to grow. However, unlike other crabgrass preventers on the market, Dimension also kills crabgrass up until the 2 to 3 leaf seedling stage. Meaning it also works as a semi-postemergent as well. This allows you a longer window for application, in case weather is not conducive for applying or in case you just plain forget.
In my experience, even though this chemical is forgiving, it’s best to use it as a preventative to be safe. It works best when it is applied before crabgrass plants emerge.
Overall, Greenview Weed & Feed with Crabgrass Preventer needs to be put down in the spring while broadleaf weeds are active but crabgrass has not started to grow (or has just begun). In most cases in the Mid Atlantic region, crabgrass preventers are applied when the forsythia plant is in bloom. This is usually a good indicator that soils are beginning to warm (around 55 degrees or so) and crabgrass will be on the way soon.
However, since this chemical (specifically the Dimension for crabgrass control) allows you to apply a little later than typical crabgrass preventers such as Scotts, you can usually wait a little longer for application. In my area of Maryland (Carroll County) we usually apply this chemical around the time that dandelions are in bloom, which for us typically lands in mid to late April.
What you’re shooting for is to wait long enough so that you’re killing the maximum amount of active broadleaf weeds but also applying early enough to be ahead of crabgrass emergence.
It takes a little planning, patience, and proper timing to do this correctly. But in most cases, the chemical is pretty forgiving and allows such a large window of potential application timing that it is tough to completely get the timing wrong as long as you understand the basics about how it works. Keep in mind that each year is slightly different (with temperatures, weather, etc.) and you may want to talk to a knowledgeable professional at a local garden center (or contact us!) to find the proper timing to apply.
When you apply, you’ll want to do so when the grass is slightly moist. Right after a gentle rain or morning dew are both perfect times. Your limiting factor is the broadleaf herbicide–you need that to stick to the leaves. If any of the crabgrass control or fertilizer stick to the leaves, it’s ok–they will fall off eventually and work their magic once they reach the soil. Try to apply when rain is not in the forecast for at least 24 hours so that the broadleaf herbicide has some time to be absorbed into the leaves. However, you will want rain within a week or so to help water in the other components of the product.
Because this chemical is a 3-in-1, there is no need for a traditional multi-step lawn care program. In many cases, one application of this chemical is effective for an entire year of control.
That said, there are two things to consider moving forward:
1. Watch out for the emergence of any weeds that were not actively growing or were missed during the application of chemical. These can be spot sprayed with chemicals such as Bonide Chickweed Clover & Oxalis Killer or Weed B Gon.
2. Dimension lasts for roughly 3-4 months depending on rainfall, temperature, and other environmental factors. For maximum protection against crabgrass and other weeds, you may want to reapply with a 2nd application in late May. This will ensure that crabgrass is controlled throughout the entire growing season and through to fall, and it will also kill any broadleaf weeds that may have been missed during the 1st application.
A reapplication of this chemical is especially ideal for lawns that are more than 30% to 40% weeds.
Proper Application in Sum:
– Ensure spreader setting is correct.
– Apply at correct timing, possibly when dandelions are in bloom (if in doubt, contact an expert)
– Apply when grass is slightly moist.
– Possibly reapply later in the spring for full season control.
– 2nd (or 3rd) application in the fall can be done to fertilize, kill broadleaf weeds, and prevent winter annual weed seeds from germinating.
Pros to Using Greenview All in One Weed & Feed Plus Crabgrass
- This product is a 3-in-1 which controls broadleaf weeds, prevents crabgrass, and fertilizes. It’s a step saver–you don’t have to worry about putting several products on your lawn.
- Easy to apply using a lawn spreader.
- Active ingredient Dimension allows more flexibility in timing than other crabgrass preventers.
Cons to Using Greenview All in One Weed & Feed Plus Crabgrass
- Needs to be timed properly for crabgrass prevention. Although it has some wiggle room, once crabgrass is past the 3 leafed stage Dimension will not have the effect you desire.
- This is one of the more expensive products on the market; however, since it is a 3-in-1 product it does have value.
- The broadleaf weed killer within this product is great for killing many larger-leafed weeds such as plantain and dandelion, but just like all granule herbicides, it will struggle on smaller, aggressive species such as creeping charlie, chickweed, oxalis, and clover.
Helpful Link: How to Use Pesticides in Their Various Forms
This product comes in a granule form which is applied using a spreader. Spreader settings are located on the back of the bag. If for some reason you can’t find your spreader, you can click to the Lebanon website to find the proper setting.
The 5,000 square foot bag covers about ⅛ of an acre (an acre is 43,560 sf) so this is great for small properties and townhouses. A larger 10,000 square foot bag is also available.