Prodiamine Pre-Emergent | Long-Lasting Weed Prevention

Q: When should I apply Prodiamine pre-emergent?

Spring: Apply before soil temperatures reach 55°F for three consecutive days to prevent crabgrass and summer weeds.Fall: Apply before soil cools below 70°F to block poa annua and winter weeds.

A white bag of Lawn Synergy Starter 15-20-10 professional lawn fertilizer with green geometric accents and branding.

RECOMMENED NOW

Emerald 10-0-20

Tall Fescue, Kentucky Bluegrass, Zoysia, St. Augustine, and Centipede Lawns.

RECOMMENED NOW

Almighty 20-0-10

Bermuda Lawns & Lawns needing more growth.

Seeding or Sod

Starter Fertilizer

The Key to Faster Germination & Stronger Roots

Organics Option

BioBoost

Build up organics within the soil while also feeding the lawn.

Measure Your Lawn

Order the correct amout of product based on the sq ft of your lawn.

Spreader Settings

Common spreader settings for various lawn products.

Explore Now

Shop by Category

Lawn Fertilizer

Feed your lawn for season-long results.

Grass Seed

Clean weed-free seed for a ultra-dark green lawn.

Weed Control

Clean up pesky weeds that don't belong in your lawn.

Fungicide

Prevent and cure disease in your lawn and ornamentals.

Insecticide

Don't let insects destroy your lawn. Treat ticks mosquitos, and more.

Shop By Lawn Type

Tall Fescue

Bermuda

Zoysia

St. Augustine

Centipede

Northern Lawns

Not sure what your lawn needs?

Join our Lawn of the Year Program and take the guesswork out of lawn care. We’ll deliver the right products at the right time, so your lawn gets exactly what it needs all season long.

Learn More

How It Works

1

Choose Your Lawn

Tell us your lawn type and goals.

2

Get Your Program

We recommend the right products and timing.

3

Apply With Confidence

Simple steps for a thicker, greener lawn.

1

Choose Your Lawn

Tell us your lawn type and goals.

2

Get Your Program

We recommend the right products and timing.

3

Apply With Confidence

Simple steps for a thicker, greener lawn.

Prodiamine Pre-Emergent: Season-Long Weed Prevention

Stop weeds before they sprout with Prodiamine pre-emergent, a trusted herbicide for preventing crabgrass and other invasive weeds in lawns, sports fields, and landscapes. Whether you're applying pre-emergent Prodiamine in spring or fall, this long-lasting formula creates a protective barrier in the soil, stopping weeds before they germinate.

Why Use Prodiamine Pre-Emergent?

Season-long control of crabgrass, poa annua, and other grassy weeds.
Safe for most warm- and cool-season grasses when applied correctly.
Flexible application timing—use in early spring or fall for maximum effectiveness.

When to Apply Pre-Emergent Prodiamine

Spring (Before soil reaches 55°F for three consecutive days) – Stops crabgrass, foxtail, and summer weeds before they emerge.
Fall (Before soil cools below 70°F) – Prevents poa annua and winter annual weeds.

How Prodiamine Crabgrass Pre-Emergent Works

Once applied, Prodiamine pre-emergent herbicide binds to the soil and blocks weed seed germination, keeping your lawn weed-free without harming established turf. Water it in within 48 hours to activate the barrier.

Protect Your Lawn with Prodiamine Pre-Emergent

Prevent crabgrass and seasonal weeds before they start! Shop our Prodiamine pre-emergent herbicide options today for professional-grade weed control.

Current Best Sellers

Headway G Fungicide

$78.95

Prevent and cure disease

Emerald 10-0-20 Lawn Fertilizer

$39.99

Low nitrogen stress blend

Almighty 20-0-10 Lawn Fertilizer

$39.99

High nitrogen for growth

Bifen 7.9F Insecticide

$29.95

Treats insects and mosquitos

Pro-Grade Products

Fast Shipping

DIY Friendly

Expert Support

Got Questions?

Frequently Asked.

What is Prodiamine pre-emergent, and how does it work?

Prodiamine is a pre-emergent herbicide that prevents weed seeds from germinating by creating a barrier in the soil. It stops crabgrass, poa annua, and other grassy weeds before they emerge, keeping your lawn weed-free.

When should I apply Prodiamine pre-emergent?

Spring: Apply before soil temperatures reach 55°F for three consecutive days to prevent crabgrass and summer weeds.
Fall: Apply before soil cools below 70°F to block poa annua and winter weeds.

Does Prodiamine kill existing weeds?

No. Pre-emergents only prevent new weeds from growing. If weeds have already sprouted, you’ll need a post-emergent herbicide.

How long does Prodiamine pre-emergent last?

Prodiamine provides 8–12 weeks of weed prevention. For season-long control, a second application may be necessary in late spring or early summer.

Can I apply Prodiamine to newly seeded grass?

No. Prodiamine will prevent all seeds from germinating, including grass seed. Wait at least 8 weeks after seeding before applying pre-emergent.