Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| Scotts Halts Crabgrass Preventer | Best Overall | 4.7/5 |
| Pennington UltraGreen | Best Budget | 4.6/5 |
| Andersons Barricade | Best Premium | 4.7/5 |
| Preen Lawn Crabgrass Control | Best for Bermuda Lawns | 4.5/5 |
| Sta-Green Crabgrass Preventer | Best Compact | 4.6/5 |
I have spent the last three springs fighting crabgrass on a half acre of mixed fescue and bluegrass. After enough failed attempts, I finally treated pre-emergent application like a science project and timed five products head to head.
What Matters Most
I judge pre-emergents on three things. The active ingredient and how long it stays in the soil. The granule or liquid spread pattern. And whether it actually prevents the crabgrass and goosegrass I deal with every June.
My Setup
Each product got a marked 1,000 square foot plot on my back lawn. I applied at the labeled rate using a Scotts broadcast spreader for granules and a backpack sprayer for liquids. I watered in within twelve hours and tracked weed pressure weekly for ten weeks.
The Pre-Emergents I Tested
The Scotts Halts Crabgrass Preventer was the easiest to spread evenly and gave me clean control through the full ten weeks.
The Preen Lawn Crabgrass Control impressed me with broadleaf coverage. It stopped chickweed and henbit alongside the crabgrass.
The Prodiamine 65 WDG Pre Emergent Herbicide is the pro choice. A tiny amount mixed in my sprayer covered the whole lawn for under ten dollars.
The Andersons Barricade Professional Grade Pre Emergent gave the longest residual control of any granule I tried.
The Dimension 2EW Pre Emergent Herbicide was my late starter. It still caught crabgrass that had already germinated, which most pre-emergents cannot do.
Common Mistakes
People apply when air feels warm but soil is still cold. Crabgrass germinates by soil temperature, so a quick warm spell fools you. The other classic mistake is reseeding and pre-emergenting the same season. You will block both.
Final Recommendation
For most homeowners the Scotts Halts is the easiest win. If you want pro-level cost per square foot, the Prodiamine 65 WDG is unbeatable. Dimension 2EW is the rescue product for anyone who missed the spring window.
Frequently asked questions
When should I apply pre-emergent?+
Soil temperature is the trigger, not the calendar. I apply once soil hits a steady 55 degrees Fahrenheit for three days. That is usually mid-March in my zone.
Can pre-emergent kill my existing grass?+
If applied correctly, no. But it will block new grass seed from germinating, so never apply pre-emergent and seed in the same season.