Sunday Weed & Green - Weed & Green for Lawns - Pre-Emergent

The Verdict

If you’ve priced out a professional lawn service this year, you already know the appeal of a bag you can spread yourself. Sunday Weed & Green promises the one-two punch of stopping crabgrass before it sprouts while feeding your turf — but the 3.6-star average across 180 ratings tells you the reality is more complicated. Here’s what actually matters before you buy.

What’s in the bag

You’re getting a granular product that combines dithiopyr (the pre-emergent active ingredient) with a 20-0-4 fertilizer analysis. The label claims coverage of 5,000 square feet, which suits a quarter-acre lot with a typical house footprint. One bag, one pass. That’s the pitch.

The timing problem nobody mentions

Here’s the hard truth about any pre-emergent: it only works if you apply it before crabgrass germinates. That window is when soil temps hit 55°F consistently — usually mid-April in the Midwest, earlier in the South. Miss that window by two weeks and you’re just fertilizing weeds.

Buyers who nailed the timing report good results. One verified purchaser noted, “Applied in early April and my lawn stayed crabgrass-free through July. The grass was noticeably darker green too.” But the reviews that drag the average down tell a different story. Another buyer wrote, “Put it down Memorial Day weekend and by August I had more crabgrass than my neighbors who did nothing.” That’s not a defective product — that’s a missed application window.

What buyers actually praise

When the timing works, this product delivers. The fertilizer component gives a visible color response within two to three weeks. Several reviewers specifically called out the lack of odor compared to other weed-and-feed products — a fair point if you’re sensitive to chemical smells. The granular size spreads evenly when the bag is fresh and dry.

Where it genuinely falls short

Let’s be direct about the complaints. Multiple reviewers describe clumping issues, particularly if the bag sat in a humid garage or shed. Clumps mean clogged spreader hoppers and uneven application — which creates bare strips where crabgrass will happily establish. If you buy this, open it, break up any hardened chunks, and apply it the same day.

Also note what this product won’t do. The “Weed” in the name refers to prevention, not elimination. Existing dandelions or clover will not die. You’ll need a separate post-emergent for that. Several frustrated reviewers expected a rescue treatment and were disappointed.

Who should buy this

This is for the homeowner who understands lawn care timing and wants a single, affordable pass in early spring. If you’re the type who marks your calendar for soil temperature checks, you’ll likely be satisfied. If you want something forgiving that you can throw down whenever you remember — skip it, or you’ll be writing an angry review in August.

Three questions shoppers ask

Can I use this on a new lawn? No. The pre-emergent prevents all seed germination, including grass seed. Wait at least eight weeks after seeding.

When exactly should I apply it? Track local soil temps. When they hit 55°F at a 2-inch depth for three consecutive days, apply. In most regions, that’s tax day to early May.

Is one bag enough for my yard? Measure your lawn area — not your lot size. The 5,000 sq ft coverage is generous for a typical yard but won’t stretch to cover irregular shapes or large backyards.

The Verdict

Buy it if you’re organized enough to apply at the right time and want a budget-friendly dual-action spring treatment.

Skip it if you need something forgiving, want to kill existing weeds, or live in a humid climate where the bag might sit around.

Rating: 3.7/5 — a solid product with narrow, unforgiving conditions for success. Get the timing right and it earns its keep. Get it wrong and you’ll join the ranks of the disappointed.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.