When it comes to achieving a lush, weed-free lawn, prevention is always better than cure. A powerful pre-emergent herbicide trusted by lawn care pros and DIYers alike to help achieve that is Dimension (dithiopyr). But what exactly is Dimension, how does it work, and how can you use it to keep your lawn looking its best? Let’s break it down.
What is Dimension?
The active ingredient in Dimension is dithiopyr. Dithiopyr is a pre-emergent herbicide, meaning it stops weeds before they even have a chance to sprout. Unlike post-emergent products that target weeds after they appear, dithiopyr creates a protective barrier in the soil, preventing weed seeds from germinating and taking root. It’s especially effective against troublesome grassy weeds like crabgrass, as well as a variety of broadleaf weeds.
How Does Dimension Work?
When applied to your lawn, dimension forms a thin layer just below the soil surface. As weed seeds begin to germinate, the active ingredient, dithiopyr, disrupts their cell division, stopping growth before the weeds can emerge. This means you can enjoy a cleaner, greener lawn without the hassle of pulling or spraying weeds later in the season.
What Weeds Does Dimension Control?
Dimension is highly effective against:
- Crabgrass (a major nuisance in many lawns)
- Annual bluegrass (Poa annua)
- Henbit
- Hairy bittercress
- Chickweed
- And other annual grassy and broadleaf weeds
It’s a go-to solution for both cool-season lawns (like Kentucky bluegrass, tall fescue, and ryegrass) and warm-season lawns (such as Bermuda, St. Augustine, Zoysia, Centipede, and Bahia).
When Should You Apply Dimension?
Timing is everything with pre-emergent herbicides. For best results, apply Dimension when soil temperatures are between 55°F and 70°F. This window is typically in early spring or fall, depending on your region. This window ensures the product is in place before weed seeds start to germinate.
Pro Tip: Check local soil temps with Yard Mastery’s free app to pinpoint the perfect time for application.
How to Apply Dimension
- Choose the Right Product: Yard Mastery offers granular Dimension pre-emergent with added fertilizer (0-0-7), providing both weed prevention and a potassium boost for stress recovery and color.
- Calculate Coverage: One 45 lb bag covers up to 11,250 sq ft at the recommended rate of 4 lbs per 1,000 sq ft.
- Apply to Dry Lawn: Spread evenly using a broadcast or rotary spreader. What are the correct spreader settings?
- Water In: Water the product into the turf within 48 hours with at least 1/4" of irrigation or rainfall to activate the barrier.
- Sweep Up: Remove any granules from sidewalks or driveways.
Tips for Success
- Don’t apply if you’re seeding or overseeding: Dimension will prevent grass seed from germinating, too.
- Consider a second application: In southern regions with milder winters, a follow-up application in late fall or winter may be needed for season-long protection.
- Store properly: Keep unused product in a dry place for up to two years.
Why Choose Dimension?
Dimension is a proven, easy-to-use solution for homeowners who want to take control of their lawn’s health. With just one or two applications a year, you can dramatically reduce weed pressure and enjoy a thicker, greener lawn without the backbreaking work of pulling weeds all season long.
Ready to get started? Check out Yard Mastery’s Dimension pre-emergent and download our free Pre-Emergent Guide for more tips and strategies!
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