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You’re standing there looking at bags labeled “preemergent” and “fertilizer,” wondering what the heck the difference is. Trust me, you’re not alone. Here’s the thing though…both of these products are absolute game-changers for your lawn, but they do totally different jobs.
A gorgeous lawn doesn’t just happen. It takes knowing what to use and when to use it. Whether you’re just getting started or you’ve been doing this for years, understanding preemergent vs fertilizer is your ticket to lawn success.
So let’s break it down in plain English. We’ll cover what each one does, when to use them, and how to get that thick, green lawn that makes your neighbors jealous. Plus, we’ll point you toward the products the pros actually trust.
Think of preemergent as your lawn’s bodyguard. It’s a special type of herbicide (weed killer) that stops weed seeds from ever sprouting in the first place. Unlike the stuff you spray on weeds you can already see, preemergents work before the problem starts. Stopping weeds while they’re still underground.
They’re especially clutch against annoying weeds like crabgrass, goosegrass, and foxtail. But here’s the catch: timing is everything. You’ve got to put it down before those weed seeds wake up and start growing, which usually happens in early spring and again in fall (depending on where you live).
If you want the best preemergent for crabgrass, here are three solid options:
Important heads-up: Preemergents don’t kill weeds that are already there. They only stop new ones from popping up. That’s why getting the timing right is so crucial.
While preemergent protects your lawn from weeds, fertilizer is what actually feeds it. Think of it as food for your grass. It’s usually a mix of three main nutrients (you’ll see them as N-P-K on the bag):
Here’s what fertilizer doesn’t do: it doesn’t prevent or kill weeds. What it does do is make your grass so thick and healthy that weeds have a harder time taking over. You’ll typically apply fertilizer several times during the growing season to keep your lawn fed and happy.
Bottom line: Fertilizer feeds your grass. Preemergent protects it from weeds. Two different jobs.
Let’s break it down. Here’s how preemergent vs fertilizer stack up:
| Category | Preemergent | Fertilizer |
| What It Does | Stops weed seeds from sprouting | Feeds your lawn with nutrients |
| When to Use It | Early spring and/or fall (before weeds show up) | Throughout the growing season (spring, summer, fall) |
| What It Targets | Crabgrass, foxtail, goosegrass, broadleaf weeds | Doesn’t target weeds at all |
| The Results | Weed-free lawn through prevention | Thicker, greener, healthier grass |
| Best For | Lawns that get seasonal weed problems | Lawns that need feeding or maintenance |
For the best results, use both…just not necessarily at the same time (unless you grab a combo product that does both jobs at once).
For best results, use both—but not necessarily at the same time unless you’re using a combo product like Andersons with Dimension. That product makes it easy to feed your lawn and stop weeds like crabgrass in a single pass.
If crabgrass is your main enemy, go with:
Using these products isn’t complicated, but there are a few tricks that’ll help you get way better results.
Pro tip: If you’re busy or want to keep things simple, grab Crew Herbicide and knock out both tasks in one shot.
Whether you’re trying to win the neighborhood lawn contest or you’re a pro managing client properties, knowing the difference between preemergent vs fertilizer is huge for long-term lawn health. Here’s the quick recap:
Ready to take control of your lawn care plan? Stock up on the best products trusted by pros:
?Resolute 65 WDG – Your crabgrass control powerhouse
? Snapshot 2.5 TG – For landscape beds and ornamental weed control
? Crew Herbicide – Power and proven safety in one bag
A great lawn starts with smart choices. Let ProSolutions help you grow greener, stronger, and weed-free—season after season.