By Pat Kelly What Is a Broadleaf Weed Killer?
A broadleaf weed killer is a herbicide built to control broadleaf weeds — plants with wide, flat leaves and branching veins, as opposed to the narrow blades of grass. Most of the weeds homeowners actually hate are broadleaf: clover, dandelion, creeping charlie (ground ivy), oxalis, wild violet, chickweed, henbit, spurge, and thistle. A good broadleaf product knocks those out while leaving your lawn standing.
The key word is selective. A selective broadleaf weed killer separates the weeds from the grass; a non-selective one kills everything it touches. For a lawn, you want selective — otherwise you trade a weed problem for a bare-dirt problem.
Broadleaf vs Grassy Weeds — Know What You're Fighting
Before you buy anything, identify what you have. A broadleaf weed killer will not touch grassy weeds, and that is the number-one reason people think a product "didn't work."
- Broadleaf weeds (a broadleaf killer controls these): clover, dandelion, creeping charlie, purslane, wild violet, chickweed, henbit, spurge, thistle, oxalis, knotweed.
- Grassy weeds & sedges (a broadleaf killer does NOT control these): crabgrass, nutsedge (nutgrass), foxtail, quackgrass, goosegrass. These are grasses and sedges — a selective broadleaf herbicide leaves them alone, the same way it leaves your lawn alone.
If your problem is grassy, start with our honest organic guides to getting rid of crabgrass naturally and nutsedge instead — we tell you plainly what a selective product can and cannot do.
Ready to Take Back Your Lawn?
Salacia™ is the first OMRI-certified selective organic herbicide — kills weeds, not grass. Choose your lawn size:
How a Selective Broadleaf Weed Killer Works
Selectivity comes down to the leaf surface. Grass blades are upright and waxy, so a contact spray beads up and rolls off. Broadleaf weeds hold their leaves flat and open, so the solution stays put and is absorbed. Salacia uses that difference: a naturally derived formula that draws moisture out of broadleaf weed tissue by osmotic dehydration until the plant collapses — a physical mechanism, not synthetic chemistry. No glyphosate, no 2,4-D, no dicamba.
Organic vs Synthetic Broadleaf Herbicides
Most conventional broadleaf weed killers rely on synthetic growth-regulator chemistry. They work, but they bring the trade-offs people increasingly want to avoid around kids, pets, and pollinators. The organic side has historically been weak — vinegar and salt sprays burn the tops of weeds but kill the grass right along with them, because they are non-selective.
That gap is exactly what Salacia closes: it is the first OMRI-certified selective organic herbicide, exempt from federal pesticide registration as a FIFRA 25(b) minimum-risk product. You get broadleaf control that spares the lawn, from naturally derived ingredients — see how it stacks up in our guide to the best organic weed killer and the best selective weed killer.
Which broadleaf weed killers spare the grass?
Compared by class, never by brand. Salacia is an OMRI Listed selective organic herbicide that kills broadleaf weeds by rapid osmotic dehydration on contact and spares lawn grass at its selective rate.
| Class | Spares the grass? | How it kills | Organic use | The catch |
|---|---|---|---|---|
| Synthetic growth-regulator selectives (2,4-D, dicamba, triclopyr) | Yes, within label limits | Systemic — absorbed and carried through the plant to the root | No | The trade-offs people want to avoid around kids, pets and pollinators |
| Vinegar, salt and other non-selective organic burn-downs (acetic acid, d-limonene, pelargonic acid) | No — kills the grass right along with the weed | Burns the tops; the root regrows | Some are listed for organic use | Hard surfaces only — never a lawn product |
| Selective organic herbicide (Salacia) | Yes, at the selective rate | Rapid osmotic dehydration on contact: the solution stays on the flat, open broadleaf leaf and beads off the upright, waxy grass blade | OMRI Listed | Grassy weeds (crabgrass, nutsedge) are not targets, and coverage decides the result — what it does not touch, it does not kill |
Why the leaf surface decides it: in Lanaturo's field trials, 65 species were tested at 28 field sites, and every perennial lawn grass survived the selective rate while mortality concentrated in broadleaf species. The same trial data counted 21 species of native plants recolonizing the treated ground afterwards.
How to Apply a Broadleaf Weed Killer
Salacia is a water-soluble granular concentrate — you mix it fresh and spray. Two rates, one bag:
- Selective lawn rate: 1 lb per gallon (3 cups). Kills broadleaf weeds, spares grass.
- Non-selective rate: 1.5 lb per gallon (4 heaping cups). Clears all vegetation on driveways, gravel, and fence lines.
Apply on a calm morning after the dew has dried, when weeds are actively growing, with no rain expected for at least 4 hours. Coat the leaves thoroughly; for tap-rooted weeds like dandelion, spray into the crown so it reaches the root.
What Salacia Controls (and What It Doesn't)
At the selective rate, Salacia controls 100+ broadleaf species, including clover, dandelion, creeping charlie, white clover, wild violet, chickweed, henbit, spurge, purslane, and thistle. It does not control grassy weeds or sedges — that is the honest limit of any selective broadleaf product, and the reason we publish dedicated grassy-weed guides instead of pretending otherwise.
Not sure what you are looking at? Use our free weed identification guide to name it first.
Ready to choose a product?
Once the selective principle clicks, the practical question is which product to trust on a real lawn. Our ranked answer: the best weed killer that won't kill grass.
Lawn
Advisor
Not sure which weed you're looking at? Show Sal.
Sal is Lanaturo's lawn-care expert. He doesn't just name the weed — he builds your exact treatment plan and checks whether today is the right day to spray.
Ready to Take Back Your Lawn?
Salacia™ is the first OMRI-certified selective organic herbicide — kills weeds, not grass. Choose your lawn size:
The lawn was never the enemy. The weeds were.
A broadleaf weed killer that finally knows the difference — so the clover and dandelions go, and the grass you have been growing stays exactly where it is.
