How To Identify and Control Weeds

10 Mar How To Identify and Control Weeds

Just when you thought you’d grown a lush and healthy lawn, all of a sudden, your lawn has fallen victim to invasive plant species known as weeds. Weeds may look harmless at first, but they can be a real nuisance, competing for nutrients and water and making your turf unhealthy or simply unattractive.

The good news? Weeds are manageable. Once you learn how to identify them and understand how they grow, controlling them becomes much easier. This guide walks you through how to identify and control weeds and bring your lawn back to its healthy, green self.

What Are Weeds?

In lawns and gardens, weeds are usually fast-growing plants that spread quickly and compete with desirable plants like turfgrass, flowers, or vegetables. Many weeds are incredibly resilient, able to thrive in poor soil, survive drought, and often spread through seeds, roots, or underground stems.

Some common characteristics of weeds include:

• Rapid growth
• High seed production
• Strong root systems
• Ability to adapt to different environments

Because of these traits, weeds often take advantage of weak or stressed lawns. Thin turf, compacted soil, and poor lawn maintenance can all create ideal conditions for weeds to invade.

Common Types of Weeds (And How to Control Them)

Not all weeds look the same, so proper identification is the first step to effective weed control. Here are some of the most common lawn weeds and how to deal with them.

Bindii

Bindii is a small, low-growing annual weed that commonly appears in lawns during cooler months. It forms a flat rosette of finely divided leaves and produces small yellow flowers. As the plant matures, it develops sharp, spiky burrs that can easily stick to bare feet, making it especially troublesome for households with children or pets.

Bindii spreads through seeds that germinate in autumn and grow throughout winter and spring. To control them, a pre-emergent weed spray or broadleaf herbicide in early autumn is key. You can also hand-pull young plants before they produce burrs. Mow regularly as well to reduce flowering and seed production.

Bindweed

Bindweed is a persistent perennial weed known for its long trailing vines and trumpet-shaped white or pink flowers. It resembles a small morning glory and can quickly spread across lawns, gardens, and fences. Its deep root system makes it particularly difficult to eliminate.

Bindweed spreads through both seeds and underground rhizomes. Even small fragments of root left in the soil can regenerate into new plants. To control the spread, dig out as much of the root system as possible. Applying systemic weedkillers with glyphosate and mulching heavily are also a must. Do this repeatedly to weaken the plant over time.

Capeweed

Capeweed is an autumn/winter weed that produces bright yellow daisy-like flowers and forms a dense rosette of broad, slightly hairy leaves. It thrives in lawns with poor soil fertility and compacted soil. Capeweed spreads rapidly by seeds, which are easily dispersed by wind and animals.

Maintain proper fertilisation to keep your lawn safe from capeweed. It’s also important to apply broadleaf herbicides, especially while the plants are young. Hand-pulling is another effective method for preventing capeweed from flowering. Maintain proper aeration as well.

Clover

Clover is a broadleaf weed often recognised by its three-part leaves and small white or pink flower heads. While some homeowners tolerate clover because it fixes nitrogen in the soil, others consider it an unwanted lawn weed.

Clover often appears in lawns with low nitrogen levels and thin grass coverage. To control the spread, fertilise lawns with nitrogen to encourage grass growth. Selective herbicides for broadleaf weeds are also important. Maintain proper mowing, watering, and overseeding as well.

Crabgrass

Crabgrass is one of the most common and aggressive summer annual weeds. It grows in clumps with wide blades that spread outward from the centre, resembling crab legs. Crabgrass thrives in hot weather and typically invades thin or damaged lawns. It spreads quickly through seeds and can produce thousands in a single season. 

To control and prevent it, start by hand-pulling small infestations before they seed. Apply pre-emergent herbicides in early spring and maintain thick turf through proper mowing and fertilisation. Avoid mowing grass too short, as this encourages crabgrass growth.

Goosegrass

Goosegrass is a summer annual weed that closely resembles crabgrass but grows in a more flattened, wagon-wheel pattern. It typically appears in compacted soils, high-traffic areas, and along sidewalks or driveways.

This weed grows rapidly during warm weather and can tolerate poor soil conditions. To prevent spreading, aerate soil regularly and apply pre-emergent herbicides before germination in spring. Hand-pull young plants while roots are still shallow and improve drainage to discourage growth.

Nutgrass

Nutgrass, often called nutsedge, is a fast-growing perennial weed with bright green, triangular stems and narrow grass-like leaves. Unlike most weeds, nutgrass grows from underground tubers known as “nutlets,” which allow it to spread quickly and survive harsh conditions.

Because nutgrass thrives in wet or poorly drained soils, it’s crucial to improve lawn drainage to prevent it from spreading. You can also use herbicides that are specifically formulated for nutsedge. Avoid pulling mature plants, as this can stimulate new tuber growth. Repeated treatments may be necessary to control infestations fully.

Oxalis

Oxalis, also known as creeping woodsorrel, is easily identified by its clover-like leaves and small yellow or pink flowers. Despite its similar appearance, it is not actually clover. Oxalis spreads both by seeds and creeping stems that root at nodes, making it difficult to control once established.

To control it, hand-pull the plants carefully, removing the entire root. Apply broadleaf herbicides when plants are actively growing. Additionally, remove plants before seed pods mature and burst. Remember to maintain a dense turf as well to reduce available space for weeds.

Frequently Asked Questions

Are All Weeds Bad?

Not necessarily. Some weeds provide benefits like improving soil structure, supporting pollinators, or adding nitrogen to the soil.

However, in a lawn setting, most weeds are considered undesirable because they disrupt the turf’s uniform appearance and compete with grass for resources.

When is the Right Time to Get Rid of Weeds?

The best time to tackle weeds is early, before they flower and produce seeds.

Early intervention prevents weeds from spreading and makes them much easier to control. Seasonal treatments, especially pre-emergent herbicides, can also help stop weeds before they even appear.

How Do You Permanently Stop Weeds From Growing?

While it’s nearly impossible to eliminate weeds forever, you can dramatically reduce them by maintaining a healthy lawn. Effective strategies include:

• Regular mowing
• Proper watering
• Fertilizing appropriately
• Aerating compacted soil
• Applying pre-emergent herbicides
• Overseeding thin areas

Seek Expert Weed Control From Seed & Turf

Weeds can spread faster than expected, especially when conditions are ideal for their growth. If your lawn feels like it’s constantly battling unwanted plants, professional help can make a big difference.

At Seed and Turf, expert lawn care specialists can identify the weeds affecting your lawn and apply targeted treatments to control them effectively. With the right approach, your lawn can return to the lush, healthy space you originally envisioned.

Don’t let these bothersome weeds ruin all your hard work! Contact Seed and Turf today for some expert guidance on weeds and how to eliminate them from your precious lawn.