Southern Ag Amine 2,4-D WEED KILLER, 32oz - Quart

The Verdict

Image Alt: Southern Ag Amine 2,4-D Weed Killer 32oz quart bottle with sprayer on green lawn

The Bottom Line Up Front

If you’ve got broadleaf weeds — dandelions, clover, chickweed, plantain — creeping through your lawn and you’re tired of pulling them by hand, this concentrated 2,4-D formulation is the kind of product lawn care forums actually recommend. Southern Ag’s Amine 2,4-D is a straight-up selective herbicide that kills the weeds without nuking your grass. But before you spray, understand what you’re buying: this is a professional-grade concentrate, not a ready-to-use spray bottle. You’ll need to mix it yourself, and you’ll need to respect the label.

What You Actually Get

The 32-ounce quart bottle contains amine form 2,4-D at a 46.4% active ingredient concentration (or 4 pounds per gallon). That’s a higher concentration than many big-box store brands, which typically run 30–40% active. The amine salt formulation matters: it’s water-soluble, mixes easily, and is less volatile than ester formulations, meaning it won’t drift as easily onto your ornamentals on a breezy day.

The bottle has a child-resistant cap and clear measuring marks on the side — a small touch, but helpful when you’re mixing a two-gallon sprayer in the garage. No measuring cup included, so have one handy.

Real-World Performance

The active ingredient, 2,4-D, is one of the most studied herbicides in existence — it’s been used since the 1940s and remains a staple for broadleaf control. What Southern Ag delivers is a clean, no-frills version of that chemistry at a concentration that actually works.

In practice, here’s what you can expect:

• Mixing ratio: The label calls for 3–4 fluid ounces per gallon of water for most lawn applications. That’s roughly 2.5 tablespoons per gallon. For spot treatment, you can go slightly stronger, but don’t exceed label rates — more isn’t better here, and you risk turf injury.
• Speed of action: You’ll see weeds twisting and curling within 48–72 hours. Full kill typically takes 7–14 days, depending on temperature and weed species. Cooler weather slows things down significantly.
• Selectivity: This is the key selling point. Applied correctly, it spares common lawn grasses — Bermuda, fescue, zoysia, St. Augustine (at reduced rates) — while targeting broadleaf weeds. It will not kill crabgrass, nutsedge, or other grassy weeds. That’s not a flaw; it’s a limitation you need to know.

One practical note: 2,4-D works best when weeds are actively growing — spring and fall, not during summer heat stress. Spraying in 90°F weather can cause turf injury and reduces efficacy.

What Buyers Consistently Praise

The 4.4-star rating across 220 ratings reflects a product that delivers. Common themes in positive reviews:

“This is the real deal. I mixed it per the label and sprayed my clover-infested yard. Two weeks later, the clover was gone and my grass looked better than ever.”

“I’ve tried the ready-to-use bottles from the hardware store and they’re a ripoff. This concentrate costs less per application and works faster.”

That last point is worth emphasizing. A quart of this concentrate at roughly 4 ounces per gallon makes 8 gallons of spray solution — enough to cover roughly 8,000–10,000 square feet. Compare that to the cost of ready-to-use gallons, and you’re saving 60–70% per application.

Where It Falls Short

Be honest about the downsides before you buy:

• You must mix it yourself. There’s no sprayer attached, no measuring done for you. If you’re not comfortable reading a label and measuring accurately, this isn’t for you. Mis-mixing wastes product and can damage your lawn.
• The smell. 2,4-D has a distinct, acrid odor that lingers for a few hours after spraying. It’s not overpowering, but you’ll know it’s there. Ventilate if you’re treating near open windows.
• No rain-fast guarantee. If rain falls within 6–8 hours of application, you’ll need to reapply. Check the forecast before spraying — this is the #1 complaint in negative reviews.
• Potential for turf injury if you overspray or apply during heat stress. This is operator error, but it happens. Read the label’s turf-type restrictions carefully — St. Augustine and centipede grass require reduced rates.

Who Should Buy This

Buy it if:

• You have a broadleaf weed problem and want a cost-effective, professional-grade solution
• You already own a pump sprayer and are comfortable mixing concentrates
• You’re willing to read the label and follow application timing

Skip it if:

• You want a ready-to-use spray-and-go product (buy a hose-end or ready-to-spray formulation instead)
• You’re dealing with grassy weeds like crabgrass or nutsedge — this won’t touch them
• You have a vegetable garden nearby and no way to prevent overspray drift

FAQ: Real Questions Shoppers Ask

Q: How long after spraying can I walk on the lawn? Wait until the spray has dried completely — typically 1–2 hours in normal conditions. For pets and kids, the label recommends waiting until the product has dried, and ideally 24 hours before allowing prolonged contact. Be conservative here.

Q: Can I use this on St. Augustine grass? Yes, but at a reduced rate — 1.5–2 ounces per gallon instead of 3–4. And avoid spraying when temperatures exceed 85°F. St. Augustine is more sensitive to 2,4-D than Bermuda or fescue.

Q: Will this kill dandelions? Yes, effectively. Dandelions are one of the most susceptible weeds to 2,4-D. They’ll show twisting and deformation within days and die off within two weeks. For established dandelions, apply in early spring when they’re actively growing.

The Verdict

Buy it if you have broadleaf weeds, own a sprayer, and want the most cost-effective professional-grade solution available. Skip it if you need a grab-and-go product or have grassy weeds to control.

Rating: 4.2/5 — the concentration, value, and effectiveness earn high marks. The mixing requirement and operator-error risk knock it down slightly, but for anyone willing to follow the label, this is lawn care gold.

Pros:

• High 46.4% active ingredient concentration outperforms big-box store brands
• Cost-effective: makes 8 gallons of spray solution per quart — 60–70% cheaper than ready-to-use
• Selective formula kills broadleaf weeds without harming common lawn grasses

Cons:

• Requires DIY mixing and measuring — no sprayer or measuring tools included
• No rain-fast protection; reapplication needed if rain falls within 6–8 hours
• Turf injury risk if applied during heat stress or on sensitive grass types at wrong rates