Does Crossbow Herbicide Kill Clover?

Why Crossbow Herbicide Eliminates Clover Down to the Roots

Crossbow herbicide is designed to take down woody brush, brambles, and persistent weeds that normal lawn sprays cannot touch. The formula combines two active chemical ingredients: 2,4-D and triclopyr. Both of these chemicals are synthetic auxins, which are man-made versions of natural plant growth hormones. When a susceptible plant absorbs them, its internal systems go into overdrive. The plant begins dividing cells in a wild, uncontrolled manner, causing the stems to curl, twist, and eventually split open.

Clover is a broadleaf plant (a plant with wide leaves and netted veins, unlike narrow blades of grass). Because clover falls squarely into the broadleaf category, it reacts violently to both active ingredients in Crossbow. Within hours of exposure, clover leaves start cupping and folding downward. Within a few days, the stems turn limp and discolor, shifting from healthy green to yellow, brown, and black.

What makes this herbicide especially fatal to clover is how the chemical travels through the plant. It is a systemic herbicide, meaning it does not just burn the foliage on contact. The liquid absorbs through the leaves and travels through the plant veins directly down into the root system and underground runners. Because the chemical destroys the taproot and root buds below the surface, the clover cannot regenerate or push up fresh growth. Once a clover patch receives a direct dose, it will not recover.

This root-killing power is exactly what landowners want when clearing out invasive blackberries, poison ivy, or buckbrush. But if you have an established clover plot or a mixed grass-and-clover pasture, Crossbow treats your desirable forage the exact same way it treats a thorny briar. It wipes the clover out entirely, leaving behind dead patches where bare dirt is exposed to whatever weed seeds blow in next.

Grass Blades Versus Legumes: How Broadleaf Sprays Distinguish Targets

Many property managers buy Crossbow because the bottle clearly states that it does not harm desirable pasture grasses. That claim is accurate for true grasses, but problems happen when people assume clover counts as grass. Botanically, grasses and legumes are completely different families of plants, and weed killers treat them in opposite ways.

Grasses are monocots, which means they emerge with a single seed leaf and grow narrow, vertical blades with parallel veins. Their primary growing points stay low to the ground near the soil surface. True pasture grasses such as tall fescue, orchardgrass, timothy, and Kentucky bluegrass possess natural enzymes that quickly break down triclopyr and 2,4-D before those chemicals can disrupt their internal growth. You can spray Crossbow directly over a field of fescue, and the grass will show almost no injury.

Clover, on the other hand, is a dicot and a member of the legume family. Legumes emerge with two seed leaves, develop wide, sprawling foliage, and feature exposed growing tips at the ends of their stems. Most importantly, clover lacks the biological mechanisms needed to neutralize synthetic auxins. Its wide, flat leaves act like solar panels that catch and absorb high volumes of spray mist.

If you perform a broadcast application (spraying an entire area evenly across the ground), you deliver an identical dose to every plant in the field. The grasses shrug off the herbicide, but every clover plant in the path of the spray boom takes a lethal hit. This creates a clean stand of grass, but it completely removes the high-protein clover that grazing cattle, horses, and wildlife rely on for nutrition.

Soil Residual Time and the Waiting Period Before Reseeding

If you used Crossbow to wipe out an overgrown brush patch and now want to establish a lush clover plot, you cannot scatter fresh seed immediately. You have to account for the chemical residual (weed killer that remains active in dirt after spraying). Both active ingredients stay active in the top layers of the soil for weeks, waiting to attack any broadleaf seedling that attempts to put down roots.

Triclopyr breaks down primarily through the work of soil microbes (tiny microscopic organisms in the dirt) along with sunlight and moisture. In warm, damp soil with plenty of organic matter, soil bacteria break down the chemical relatively quickly. However, in dry, compact, or cold ground, the chemical persists much longer. If you plant clover seeds into soil that still carries active herbicide residue, the seeds may crack open, but the seedlings will wither and curl as soon as their initial roots touch the dirt.

For most agricultural and wildlife plantings, the standard waiting period before planting clover in treated ground ranges from three to four weeks under ideal conditions, and up to eight to twelve weeks if you applied heavy rates or experienced drought. If you applied Crossbow during a cool autumn or a parched summer, wait until the following spring before investing money into clover seed. Always check the specific product label on your container, because application rates directly change how long the chemical lingers in the topsoil.

Before sowing an expensive batch of seed across a large field, you can easily verify whether the dirt is safe by conducting a quick windowsill jar check. Follow these steps to confirm your soil is clean:

• Dig up three or four small scoops of topsoil from different spots in the treated field, focusing on the top two inches of dirt.
• Fill a small plastic flower pot or clean paper cup with the field dirt, and fill a second cup with potting soil from a garden store as your comparison.
• Plant five or six quick-sprouting broadleaf seeds (such as green beans, peas, or cheap clover seed) in each cup at an equal depth.
• Place both cups on a sunny indoor windowsill, keep the dirt moist with clean water, and monitor them for ten to fourteen days.
• Examine the emerging seedlings. If the plants in the treated field soil grow straight, flat, healthy green leaves identical to the control cup, the chemical has broken down. If the seedlings in the field soil emerge with twisted, cupped, or stunted leaves, wait another month before seeding your real plot.

Clover-Safe Weed Control Options for Pastures and Food Plots

Maintaining a clean clover stand without wiping out the legumes requires different tools than clearing rough brush. When problem weeds invade a clover bed, you need management practices that target the invaders while protecting the clover foliage.

Many property managers planting clover plots do so to support local deer herds before the fall hunting season. While selecting the best tenpoint crossbow for hunting is about shot accuracy and quiet handling, managing the food plot itself requires an entirely different focus on plant biology and chemical safety. Reaching for an aggressive brush killer like Crossbow will destroy the very food source you worked to establish.

If your clover field is overrun with annual grasses like foxtail, crabgrass, or barnyardgrass, use a grass-selective herbicide containing clethodim or sethoxydim. These chemicals target an enzyme found only in grasses. Broadleaf plants like clover completely ignore these sprays. You can broadcast clethodim directly over a clover field with a crop oil concentrate, and it will kill the invasive grasses down to the roots while leaving the clover bright green and untouched.

When broadleaf weeds like cocklebur, morningglory, or young ragweed invade your clover, look for an herbicide containing 2,4-DB (sold under trade names like Butyrac 200). Note the crucial "B" at the end of the name. Regular 2,4-D kills clover instantly, but 2,4-DB features a different chemical structure. Most broadleaf weeds possess an internal enzyme that converts 2,4-DB into lethal 2,4-D, which kills them. Clover lacks this specific conversion enzyme in large amounts, allowing established clover to survive the spray with only minor, temporary leaf drooping.

Mechanical control is another dependable way to save clover without any chemicals at all. Routine mowing or clipping works exceptionally well. Clover grows low to the ground and handles regular cuttings easily. Most upright weeds, like thistles, marestail, and pigweed, store their energy in tall stalks. By setting your mower deck at four to six inches, you cut off the weed flowers before they drop seeds, knock back the tall canopy that blocks sunlight, and give the dense clover space to choke out surviving weeds naturally.

Spot-Spraying Brush While Protecting Nearby Clover

There are times when Crossbow is the only chemical strong enough to solve your problem. If multiflora rose, woody saplings, or thick blackberry briars invade the edges of your clover, mowing will not kill their roots, and gentle herbicides will not touch them. In this scenario, you must spot-treat (spraying only specific target weeds) rather than spraying the entire field.

Spraying brush inside or around a clover plot requires extreme care because fine mist drifts easily on light air currents. Even a faint breeze can carry tiny droplets twenty feet away, creating dead zones in your clover stand. By adjusting your spray equipment and technique, you can eliminate tough woody brush while keeping the surrounding ground cover safe.

Here is a practical checklist to run through every time you spot-spray near clover:

• Verify the wind is blowing under five miles per hour, and spray early in the morning when the air is cool and still.
• Swap your spray wand nozzle to a coarse flat-fan or cone tip that produces heavy droplets instead of an atomized mist.
• Lower your pump pressure so liquid flows smoothly rather than blasting out in a pressurized fog.
• Carry a large piece of stiff cardboard or an overturned plastic bucket to hold between the target weed and your clover as a physical drift guard.
• Keep the spray tip within six to twelve inches of the target brush leaves to prevent wind capture.
• Wet only the target foliage until it is damp, stopping before liquid begins dripping off the leaves onto the clover underneath.
• Walk backwards as you work so your boots do not pick up wet herbicide and stamp dead footprints across your clover.

For woody saplings or thick briar canes, consider cutting the stems near the soil surface and painting concentrated brush killer directly onto the fresh stump with a sponge brush. This cut-stump method directs all the chemical straight into the target root system without letting a single drop touch the clover surrounding the base.

FAQs

Will clover ever recover after being sprayed with Crossbow?

No, clover plants hit with Crossbow will not recover or grow back from their root systems. The active chemicals move deep into the root crowns and kill the plant entirely. Any clover that reappears months later came from hard dormant seeds already buried in the dirt that sprouted after the chemical broke down.

What herbicide kills thistles and nettles without killing clover?

Herbicides containing 2,4-DB (such as Butyrac 200) can control young thistles and select broadleaf weeds while keeping established clover stands alive. Standard broadleaf killers like regular 2,4-D, triclopyr, or dicamba will wipe out the clover alongside the weeds. Always confirm weeds are young and small, as mature woody thistles tolerate 2,4-DB and require mowing or spot-treating instead.

Can grazing animals return to a field treated with Crossbow?

Grazing restrictions depend on the specific type of livestock and whether they produce milk. The product label allows non-lactating cattle, sheep, and horses to graze pasture treated with Crossbow without waiting periods, but strictly restricts lactating dairy animals until the next season. Always read the exact grazing chart on your container label, and remove livestock to allow desirable forage to regrow safely before turning animals back out.