Best Post-Emergent Crabgrass Killers for Lawns: Granular and Other Options
For crabgrass that has already emerged, BioAdvanced 5-in-1 Weed and Feed Granules is the closest match among these granular products because its listed features say it kills large crabgrass. BASF Drive XLR8 is a post-emergent crabgrass control option, but it is a liquid concentrate, not a granular product. Preen and the other listed preventers are better suited to stopping new weeds from emerging than killing established crabgrass.
| Product | Best suited for | Form or action |
|---|---|---|
| BioAdvanced 5-in-1 | Emerging or established crabgrass plus other listed weeds | Granules; kills and prevents |
| BASF Drive XLR8 | Post-emergent control in lawn and turf | Liquid concentrate |
| Preen Lawn Crabgrass Control | Season-long prevention, including a limited after-emergence window | Granules |
| Scotts Halts | Seasonal crabgrass prevention | Granular preventer |
| Yard Mastery 0-0-7 Prodiamine | Preventing crabgrass and other listed weeds | Granular pre-emergent |
BioAdvanced 5-in-1 Weed and Feed Granules
Best for: Buyers seeking a granular product that lists both crabgrass control and prevention. Its features say it kills large crabgrass, targets more than 200 listed weed types, and helps prevent listed weeds for up to six months.
The product description says it can be applied in spring or early summer even if crabgrass and weeds have already sprouted. It also describes a long-lasting barrier against crabgrass returning. This makes it the strongest granular fit here for a buyer dealing with existing crabgrass as well as future weeds.
Limitation: The feature list does not establish that every lawn grass type can safely receive it. Check the full label for turf compatibility, application instructions, and restrictions before use.
BASF Drive XLR8 Crabgrass Killer
Best for: Buyers prioritizing post-emergent control over a granular application. This concentrate contains quinclorac and lists crabgrass, foxtail, and several broadleaf weeds among its targets. The listed features also state up to 30 days of residual control and rainfastness in less than an hour.
Choose this if the main need is treating weeds that are already growing and a liquid concentrate is acceptable. Its stated target list makes it a relevant alternative when the search specifically concerns post-emergent crabgrass control.
Limitation: This is not a granular product. Follow its product label for mixing, application, lawn suitability, and protective measures.
Preen Lawn Crabgrass Control
Best for: Buyers looking for granular season-long crabgrass prevention with a stated application window after emergence. Preen says it can be applied up to four weeks after crabgrass emerges and also prevents more than 40 common lawn weeds.
Its post-emergence timing claim makes it more relevant than a strictly pre-emergent product for someone who has noticed early crabgrass. However, the listed features emphasize preventing crabgrass and weeds; they do not clearly say that it kills mature, established crabgrass.
Limitation: Do not assume the after-emergence application will eliminate visible crabgrass. Check the label to confirm the timing and intended effect.
Scotts Halts Crabgrass Preventer
Best for: Buyers who want to prevent crabgrass before it emerges. The listed features describe one spring application for season-long prevention and a fall application intended to prevent winter weeds such as poa annua, henbit, and chickweed.
This is a prevention-focused choice, not the best match for a lawn with established crabgrass. Choose it when the goal is to stop new crabgrass from appearing and application timing is still appropriate according to the label.
Limitation: Its listed features do not describe killing emerged crabgrass. It is not a post-emergent treatment for visible weeds.
Yard Mastery 0-0-7 Prodiamine Granules
Best for: Buyers seeking a granular pre-emergent barrier against crabgrass and other listed weeds, including poa annua, bittercress, chickweed, and henbit. The product is described as a 0-0-7 prodiamine formulation covering 15,000 square feet at the stated application rate.
Choose this for prevention planning rather than treatment of weeds already growing. Its active ingredient and listed purpose identify it as a pre-emergent option.
Limitation: The product features do not claim to kill emerged crabgrass. Follow the label for timing, rate, and lawn-specific directions.
Buying Guide: Choosing a Crabgrass Treatment
Do you need to kill visible crabgrass or prevent new growth?
For visible crabgrass, look for a product explicitly labeled for post-emergent control. Among these options, BioAdvanced is the listed granular choice with a claim to kill large crabgrass; BASF Drive XLR8 is a liquid post-emergent alternative. Pre-emergent products such as Scotts Halts and prodiamine are intended to prevent weeds from emerging, not remove established plants.
Does granular application matter?
Granules can be convenient for spreading across a lawn, but the product form alone does not indicate whether a weed will be killed. Confirm that the label identifies the product as post-emergent if treating existing crabgrass. Drive XLR8 is a concentrate, so it does not meet a strict granular requirement.
What should you check before applying?
- Confirm the product is labeled for your lawn grass and the weeds you want to control.
- Read the complete label for timing, application rate, watering instructions, and precautions.
- Check whether the product is a weed killer, a preventer, or a combination before choosing.
- Use the stated coverage information to estimate how much product is needed; do not exceed label directions.
Frequently Asked Questions
Can granular crabgrass preventer kill crabgrass that has already emerged?
Not necessarily. A pre-emergent prevents new weeds from emerging; it should not be treated as a post-emergent killer unless its label explicitly says so.
Which listed granular product targets existing crabgrass?
BioAdvanced 5-in-1 lists control of large crabgrass and says it can be applied after weeds have sprouted. Verify the label for lawn suitability and application directions.
Is BASF Drive XLR8 a granular product?
No. It is a liquid concentrate with listed post-emergent crabgrass control.
Is Preen a post-emergent crabgrass killer?
Preen lists an application window up to four weeks after crabgrass emerges, but its features emphasize prevention. Check the label rather than assuming it kills established crabgrass.
When should a pre-emergent be used?
Use it at the timing specified on its label, before the target weeds emerge. A pre-emergent is not a substitute for a post-emergent treatment when crabgrass is already growing.