Kansas City Weed Identification Guide: 10 Common Weeds in Local Lawns

A few weeds in your lawn may not seem like a major problem at first. However, when weeds begin spreading through thin or stressed areas, they can quickly compete with your grass for sunlight, water, nutrients, and space.

Kansas City’s changing weather makes weed control especially challenging. Hot summers, periods of drought, heavy rain, compacted soil, and unpredictable winters can all weaken turfgrass. Once the lawn becomes thin enough for soil to show through, weed seeds have an opportunity to germinate.

The first step toward controlling weeds is identifying what is growing in your yard. Different weeds require different treatments, and using the wrong product or applying it at the wrong time can produce poor results or damage desirable grass and nearby plants. Volz Lawn & Landscape treats every weed on this list as part of our seasonal fertilization and weed control program, and identification is always where we start.

This Kansas City weed identification guide covers some of the most common weeds found in lawns throughout Overland Park, Olathe, Leawood, Lenexa, Shawnee, Prairie Village, and the surrounding Kansas City area.

Before treating a lawn weed, determine whether it is a broadleaf weed, grassy weed, or sedge.

Broadleaf weeds generally have wider leaves with visible veins. Common examples include dandelions, clover, chickweed, henbit, plantain, wild violet, and ground ivy.

Some broadleaf weeds complete their life cycle in one growing season, while perennial broadleaf weeds return from their roots year after year.

Grassy weeds look similar to turfgrass, which can make them harder to identify. Crabgrass and goosegrass are common annual grassy weeds in Kansas City lawns.

Because these weeds are grasses growing within another type of grass, treatment options are more limited than they are for many broadleaf weeds.

Sedges may look like grass, but they belong to a different plant family. Yellow nutsedge is the most recognizable example.

Many standard broadleaf and grassy weed treatments will not control sedges. This is one reason proper identification is so important.

K-State Research and Extension notes that Kansas City lawns commonly experience a mixture of crabgrass, dandelions, henbit, chickweed, spurge, clover, wild violets, nutsedge, and other weeds. Each category has a different life cycle and preferred treatment window, so there is no single application that eliminates every lawn weed.

Dandelions are among the easiest Kansas City lawn weeds to recognize, and they are a perennial broadleaf weed.

Dandelions grow in a low circular pattern known as a basal rosette. Their leaves are long and deeply indented, with lobes that generally point back toward the center of the plant.

Mature plants produce bright yellow flowers on hollow, leafless stems. The flowers eventually become round white seedheads that release seeds into the wind.

Below the surface, dandelions develop a deep taproot. If only the leaves are removed and a large portion of the root remains, the plant may grow back.

Dandelions are perennial weeds, meaning established plants can return year after year. They are especially noticeable during spring but may flower again throughout the growing season when conditions are favorable.

Dandelions often establish in thin turf and compacted soil. Open spaces between grass plants give their windblown seeds room to reach the soil and germinate.

Small numbers of dandelions can be removed manually, but the taproot should be removed as completely as possible. Established infestations may require a selective broadleaf weed treatment.

Fall is often an effective time to address perennial broadleaf weeds because actively growing plants move nutrients—and properly selected treatments—into their root systems before winter.

Crabgrass is one of the most common and frustrating summer weeds in Kansas City lawns, and it is an annual grassy weed.

Crabgrass usually appears as a light-green, coarse-textured clump that grows outward close to the ground. Its spreading stems can create a wide, uneven patch that looks different from the surrounding lawn.

Large crabgrass has hairy leaves and sheaths. Its stems spread along the ground and may root where the nodes contact the soil. As the plant matures, portions of the leaves and stems may develop dark red or maroon coloring.

Crabgrass is a warm-season annual weed. New plants germinate from seed during spring, become much more noticeable during summer, and die after freezing temperatures arrive.

The plants may die each winter, but they can produce large amounts of seed before that happens. Those seeds can remain in the soil and contribute to another outbreak the following year.

Crabgrass commonly develops in areas where the lawn is:

• Mowed too short
• Thin or damaged
• Growing near hot sidewalks and driveways
• Exposed to full sunlight
• Struggling with drought or summer stress

Preventing crabgrass is generally more effective than trying to eliminate mature plants during summer.

Preemergent weed control should be applied before crabgrass seeds begin germinating. Once the crabgrass is established and mature, control becomes more difficult.

A thick lawn also provides natural competition by shading the soil and reducing the amount of sunlight available to weed seeds.

White clover is a perennial broadleaf weed recognizable by its three-part leaves and round white flowers.

Each white clover leaf contains three small leaflets. The leaflets frequently have a pale white or light-green V-shaped marking near their base.

White clover grows close to the ground and spreads through creeping stems that root at the nodes. Its round flower heads consist of multiple small white flowers.

White clover is a perennial plant and may return year after year. It is especially noticeable when its white flowers appear during late spring and summer.

Clover is capable of obtaining nitrogen differently than turfgrass. As a result, it can sometimes gain an advantage in lawns with low nitrogen levels or inconsistent fertilization.

Its presence does not automatically prove that the lawn needs fertilizer, but widespread clover may be a reason to evaluate the lawn’s fertility, soil conditions, and overall maintenance plan.

Improving turf density and correcting fertility problems can make the lawn less favorable for clover. Existing patches may require selective broadleaf weed control.

Because its stems can root as they spread, pulling only the visible leaves may not remove the entire plant.

Henbit is a winter annual broadleaf weed and one of the purple-flowering weeds that commonly appears in Kansas City lawns during early spring.

Henbit has square stems and rounded leaves with scalloped edges. The lower leaves have short stalks, while the upper leaves wrap more closely around the stem.

Its pink or purple tubular flowers grow in clusters near the upper portion of the plant. Stems may remain partly along the ground before turning upward.

Henbit is typically a winter annual. It often germinates during fall, remains small through winter, and grows rapidly when temperatures begin warming in spring.

By the time homeowners notice its flowers, the plant may already be mature and producing seed.

Henbit commonly takes advantage of bare soil, thin turf, low fertility, and disturbed areas. It may appear along lawn edges, garden beds, newly seeded areas, and locations where grass coverage is weak.

The most effective time to address winter annual broadleaf weeds is generally during fall while the plants are still young.

Spring treatment may reduce visible weeds, but it may occur after the plants have already produced or begun producing seeds. Strengthening thin turf during the appropriate growing season can help reduce future outbreaks.

Common chickweed is a cool-season broadleaf weed that can spread into dense patches.

Chickweed grows close to the ground with thin, branching stems and small oval leaves arranged in opposite pairs.

Its tiny white flowers have five deeply divided petals. Because each petal is split, the flower may appear to have ten petals when viewed from a distance.

Common chickweed has a shallow, fibrous root system. Its stems may spread across the soil and form roots at the nodes.

Common chickweed is generally a winter annual. It germinates during cool conditions, survives through winter, and becomes more visible during early spring.

It prefers cool, moist environments and may decline as temperatures become hot.

Chickweed often develops in areas with:

• Thin turf
• Excess moisture
• Poor drainage
• Shade
• Soil that remains cool and damp

Small patches may be removed by hand because the roots are relatively shallow. Larger infestations are best addressed while the plants are young.

Improving drainage, reducing unnecessary irrigation, and selecting turfgrass suited to shaded areas can help make the lawn less favorable for chickweed.

Spotted spurge is a low-growing summer annual broadleaf weed that frequently appears along sidewalks, driveways, patios, and bare areas.

Spotted spurge forms a flat, spreading mat that radiates outward from a central point. Its stems are often reddish or pink, while its small leaves grow in opposite pairs.

Many leaves have a dark maroon spot near the center, although the marking is not equally visible on every plant.

When the stem is broken, spotted spurge releases a milky sap. The plant may spread into a mat measuring more than a foot across.

Avoid getting the sap in your eyes or on sensitive skin, and wash your hands after handling the plant.

Spotted spurge is a warm-season annual. It thrives during hot weather and often becomes most noticeable in summer.

Spurge commonly grows where turfgrass is weak and the soil surface is exposed. Typical locations include:

• Cracks along pavement
• Compacted lawn edges
• Bare landscape beds
• Areas damaged by heat
• Closely mowed or scalped turf

Young plants can often be pulled before they produce seed. Removing established mats becomes more difficult once stems have spread across a large area.

The long-term solution is to correct the bare or thin conditions that allowed spurge to establish. Overseeding, improving the soil, maintaining a proper mowing height, and preventing summer turf damage can reduce future infestations.

Yellow nutsedge is commonly mistaken for grass, but it is a sedge and requires a different approach.

Yellow nutsedge usually grows faster and stands taller than the surrounding lawn. Its leaves are shiny and yellow-green, with a noticeable ridge running along the center.

One of the easiest identification methods is to feel or carefully roll the stem between your fingers. Yellow nutsedge stems are triangular rather than round.

The plant spreads through underground stems and small tubers, sometimes called nutlets.

Yellow nutsedge is a warm-season perennial. It becomes especially noticeable during late spring and summer, when its upright growth rises above recently mowed grass.

Nutsedge often thrives in wet or poorly drained soil. It may point to:

• Excessive irrigation
• Low areas that hold water
• Drainage problems
• Compacted soil
• Leaking sprinkler components

However, established nutsedge can remain after the original moisture problem has been corrected.

Do not assume that a normal grass or broadleaf weed product will control nutsedge. Sedges require specifically labeled treatment options.

Repeated pulling can also be ineffective if underground tubers remain in the soil. Correcting excess moisture and using a treatment intended for sedges generally provides better long-term results.

Ground ivy, often called creeping Charlie, is a spreading perennial broadleaf weed that can be particularly aggressive in shaded lawns.

Ground ivy has round or kidney-shaped leaves with scalloped edges. Its stems are square and trail along the ground, forming roots at the nodes.

Small blue-purple flowers may appear in clusters. When the leaves are crushed or mowed, the plant may release a noticeable mint-like smell.

Ground ivy is a perennial and can survive from year to year. It often spreads during cool, moist conditions but may remain visible throughout much of the growing season.

Ground ivy is frequently found in:

• Shaded lawns
• Moist soil
• Thin turf
• Areas with poor air movement
• Locations where grass is not well adapted to the amount of shade

Because ground ivy spreads through creeping stems and roots at multiple points, pulling a portion of the plant may not eliminate the entire patch.

Control may require repeated selective treatment combined with changes to the site. Improving drainage, reducing excessive watering, trimming vegetation to increase sunlight, or replacing struggling turf with a more suitable ground cover may be necessary in heavily shaded areas.

Broadleaf plantain is a durable perennial broadleaf weed that tolerates mowing and foot traffic.

Broadleaf plantain forms a low rosette of wide, oval leaves. Several strong veins run from the base of each leaf toward the tip.

The plant produces upright, leafless flower stalks with narrow seedheads. The leaves remain low enough that a mower may pass over them without removing much of the plant.

Broadleaf plantain is a perennial and may remain in the lawn throughout much of the growing season.

Plantain commonly appears in compacted soil and high-traffic areas. It may be found near:

• Sidewalks
• Driveways
• Play areas
• Pet paths
• Frequently walked lawn edges

Individual plants can be dug out, but the crown and roots should be removed. Larger infestations may require selective broadleaf weed control.

Core aeration and improvements to compacted soil can help address the conditions that allowed plantain to become established.

Wild violet is a perennial broadleaf weed that can look attractive when flowering, but it may become difficult to manage when it spreads into large patches.

Wild violets have heart-shaped leaves with rounded teeth along the edges. Their flowers are usually purple or blue-violet, although flower color can vary.

The plant grows low to the ground and can spread through underground structures, allowing it to return after the visible leaves have been removed.

Wild violet is a perennial. Flowers are most noticeable during spring, but the leaves may remain visible well after flowering ends.

Wild violets commonly grow in moist, shaded, or partially shaded areas. They often appear beneath trees, along wooded lawn edges, and in sections where turfgrass has difficulty becoming dense.

Wild violet can be difficult to control because of its underground growth and waxy leaf surfaces. Established patches may require repeated treatment over more than one season.

Improving the density of the surrounding turf and correcting excessive shade or moisture can help reduce reinfestation. Wild violet is among the perennial broadleaf weeds commonly found in Missouri and Kansas City-area lawns.

Weeds are not always random. The types of weeds growing in your lawn can provide clues about the conditions beneath them.

A lawn with widespread weeds may be experiencing one or more of the following problems:

• Thin turfgrass
• Improper mowing
• Compacted soil
• Poor drainage
• Excessive watering
• Insufficient sunlight
• Inconsistent fertilization
• Bare areas caused by insects, disease, pets, or traffic
• Grass varieties that are poorly suited to the location

Treating the weeds may improve the lawn’s appearance, but the weeds may return if the underlying problem is not corrected.

The best weed-control strategy is to maintain thick, healthy turf that leaves little room for unwanted plants.

Mowing too short weakens the lawn and allows more sunlight to reach the soil surface. That sunlight can encourage weed seeds to germinate.

For tall fescue and Kentucky bluegrass lawns, University of Missouri Extension recommends mowing at approximately 3½ to 4 inches. Zoysiagrass is generally maintained lower, at approximately 1 to 2 inches. Avoid removing more than one-third of the grass blade during a single mowing. Our lawn maintenance program is built around these mowing heights.

Proper fertilization encourages turfgrass to grow thicker and compete more effectively with weeds. Too little fertilizer may leave the lawn thin, while applying too much or using the wrong timing can contribute to other lawn problems.

A professional fertilization program should account for the type of grass, season, soil conditions, and current health of the lawn.

Frequent, shallow watering can encourage shallow roots and create favorable conditions for certain weeds.

Watering should support the turfgrass without leaving the soil continuously saturated. Areas that stay wet long after the rest of the lawn dries may need drainage or irrigation adjustments.

Compacted soil limits the movement of water, oxygen, and nutrients into the root zone. It can also favor weeds such as plantain, crabgrass, and dandelion.

Core aeration helps relieve compaction and creates better growing conditions for desirable turfgrass.

Bare and thin areas provide space for weed seeds to germinate. Overseeding with an appropriate grass variety can improve turf density and reduce opportunities for weeds.

For many Kansas City cool-season lawns, fall provides favorable conditions for aeration and overseeding.

Timing is one of the most important parts of lawn weed control.

Annual grassy weeds are usually addressed with preemergent treatment before their seeds germinate. Cool-season annual broadleaf weeds are often best controlled while young during fall. Perennial broadleaf weeds generally respond best when they are actively growing, while sedges require products specifically intended for that plant category.

Always read and follow the complete product label. Avoid spraying during windy conditions, and take precautions to prevent treatments from drifting onto trees, flowers, shrubs, vegetable gardens, or neighboring properties.

A few isolated weeds may be manageable with hand removal or careful spot treatment. Professional lawn care may be helpful when:

• Several weed species are growing at the same time
• Weeds return shortly after treatment
• Crabgrass appears throughout the lawn every summer
• Clover covers large sections of turf
• Nutsedge continues spreading
• Ground ivy or wild violet has formed dense patches
• The grass is too thin to compete with weeds
• You are unsure which treatment is safe for your type of lawn
• Fertilization, aeration, overseeding, or soil improvement is also needed

Successful weed control is rarely about applying one product once. It usually requires a seasonal plan that combines prevention, properly timed treatment, fertilization, mowing, watering, and improvements to overall turf health.

Volz Lawn & Landscape provides professional fertilization and weed-control services for homeowners throughout the Kansas City area, including treatment for every broadleaf, grassy, and sedge weed covered in this guide.

Our fertilization program is designed to feed the lawn during the appropriate parts of the growing season while addressing common broadleaf and grassy weeds. Instead of treating every lawn exactly the same, we evaluate the condition of the turf and build a plan that supports thicker, healthier grass.

A dense, properly maintained lawn does more than look better. It also provides natural competition against many of the weeds trying to take over your yard.

Contact Volz Lawn & Landscape today to request an estimate for professional lawn fertilization and weed control in Overland Park, Olathe, Leawood, Lenexa, Shawnee, Prairie Village, and surrounding Kansas City communities.

Common Kansas City lawn weeds include dandelions, crabgrass, white clover, henbit, chickweed, spotted spurge, yellow nutsedge, ground ivy, broadleaf plantain, and wild violet. The exact weeds in a lawn will depend on the season, turf density, soil, moisture, sunlight, and maintenance practices.

Multiple weed species usually mean the turf has become thin or stressed in several areas. Heat, drought, excessive moisture, compacted soil, low fertility, improper mowing, shade, and bare soil can create opportunities for different types of weeds.

No. Crabgrass is a warm-season annual grassy weed that grows from seed, spreads close to the ground, and dies after freezing weather. Tall fescue is a cool-season perennial turfgrass commonly used in Kansas City lawns.

No. Nutsedge is a sedge, even though its narrow leaves make it look like grass. Yellow nutsedge has triangular stems and often grows faster than the surrounding turf. It usually requires a treatment specifically labeled for sedges.

The correct timing depends on the weed. Crabgrass prevention is generally performed during early spring before germination. Many winter annual weeds are best addressed during fall, while perennial broadleaf weeds should be treated when they are actively growing. Proper identification should come before treatment.

Fertilization alone will not eliminate established weeds. However, an appropriate fertilization program can help turfgrass become thicker and more competitive. The best results usually come from combining proper fertilization with correctly timed weed prevention and treatment.

The weed may have been incorrectly identified, treated at the wrong growth stage, or exposed to a product that does not control that category of plant. Perennial weeds may also regrow from roots, rhizomes, or tubers. Thin turf and unresolved soil or drainage problems can allow new weeds to establish after the original plants are removed.