In spite of meticulous lawn care, weeds have an uncanny ability to sprout and infiltrate even the most well-maintained lawns. Among these intruders are grassy weeds that cleverly mimic the appearance of desirable grass, often blending seamlessly into your turf. Recognizing these impostors is crucial to preserving the lush greenery you’ve worked so hard to cultivate.
Identifying and classifying these weeds is the first step toward effective lawn management. Furthermore, the types of weeds flourishing in your yard can offer insights into underlying soil and turf issues.
1. Annual Bluegrass (Poa annua)
One of the most common grass-like weeds is Annual Bluegrass, scientifically known as Poa annua. It shares genetic traits with other Poa grasses, such as Kentucky Bluegrass. Distinguished by its vibrant coloring, Annual Bluegrass boasts canoe-shaped leaf tips. Thriving in cool seasons and preferring moist environments, it tends to take root in wet, shaded areas of residential lawns. As temperatures rise in the summer, it withers, leaving bare patches in its wake.
2. Crabgrass
Crabgrass, a well-known foe, comes in two common varieties: smooth crabgrass and large crabgrass. These annual weeds flourish during summer, forming patches that can quickly overwhelm your lawn. They are exceptionally resilient, tolerating both heat and drought. Smooth crabgrass, often found in lawns, sports low, smooth, dark green leaves that can grow up to six inches in height if left unmowed. The first frost of winter typically puts an end to its reign. Large crabgrass, although less commonly seen in lawns, can reach heights of up to two feet.
3. Nutsedge (Nutgrass)
Nutsedge, also known as Nutgrass, emerges during the summer months, its shoots towering above fescue or Bermuda lawns. Easily noticeable in well-manicured yards, it tends to grow taller between mowing sessions. To eliminate Nutsedge, carefully uproot it from the base to ensure complete root removal, preventing further offshoots. This perennial sedge can thrive each season if not kept in check, but products like SedgeHammer can help maintain control.
4. Common Couch
Common Couch is a grassy weed that forms a dense mat-like layer over lawn turf. Its underground stems enable it to spread rapidly throughout the lawn. Characterized by flat, hairless leaves and flower stems resembling windmills or umbrellas, it thrives in full sun but poorly in shaded areas. Although sometimes considered a turf grass, many see it as an invasive nuisance. Hand-pulling can be effective, but thorough root removal is essential. Heavy infestations may require herbicide treatment.
5. Tropical Carpet Grass (Axonopus sp.)
Tropical Carpet Grass, also known as Axonopus Compressus, is a robust, dense grass ideal for subtropical and tropical climates. Creeping in growth, it forms a low mat with shiny, waxy leaves. Its crinkly leaves and vivid green coloring make it easily distinguishable, though it’s often labeled as a weed despite its potential for use in yards and parks. Sensitive to drought and broadleaf herbicides, it can be managed effectively with proper moisture and herbicide treatments.
6. Blue Fescue
Blue Fescue, an ornamental plant with striking blue-green foliage, is commonly used as ground cover or for accentuating landscapes. Growing in mounds up to twelve inches high, this evergreen cool-season plant features needle-like spikes and bright green flowers. Although it shares a name with other fescues, it differs from typical turf fescues. Eradication options include hand-pulling or applying glyphosate herbicide.
7. Goosegrass (Eleusine indica)
Goosegrass, also known as Wiregrass or Silver Crabgrass, thrives in harsh conditions and is often mistaken for crabgrass. Sporting a light green hue, it grows in clumps with flattened stems, reaching widths of up to 2.5 feet. Recognizable by its white center and wagon wheel-like growth pattern, this summer weed germinates when soil temperatures surpass 60 degrees Fahrenheit. Pre-emergents can help control it, but for a few sprouting weeds, hand-pulling is a viable alternative. Oxadiazon and dimethenamid are effective chemicals for tackling larger infestations.
8. Creeping Bentgrass
Creeping Bentgrass is a fast-growing, dense plant that can swiftly overtake a lawn. With a light, bright green shade, it differs from darker grasses like Kentucky Bluegrass. Its long, slender leaves are distinctive once you know what to look for. Occasionally used for specialty purposes such as putting greens and lawn tennis, it’s considered a nuisance in regular lawns. Glyphosate-based herbicides can kill Creeping Bentgrass, but they may affect desired grass as well. Ensure your lawn grass is herbicide-tolerant or consider tilling and re-sodding for heavy infestations.
How to Eliminate Grass-Like Weeds: A Step-by-Step Guide
- Prepare Your Sprayer or Spreader: Set your sprayer or spreader according to the recommended settings provided on the herbicide packaging. Read and follow the instructions carefully.
- Add the Weed Killer: Measure and add the appropriate amount of herbicide, whether it’s in liquid or granule form, into your chosen applicator.
- Apply to the Weeds: Distribute the herbicide evenly over the affected area, ensuring thorough coverage if using a spray. Avoid watering the treated area for 1-2 hours. If using granules, you can water immediately.
Estimated Cost: $69 USD
Supplies:
- Goggles
- Gloves
- Hand spreader or sprayer
Tools:
- Weedkiller (liquid or granules)
By following these steps, you can effectively combat grass-like weeds and reclaim your lawn’s lush, weed-free appearance.
What Kills Weeds That Look Like Grass?
When it comes to battling weeds that closely resemble grass, knowing the right approach can make all the difference in achieving a weed-free lawn. Here are some tried-and-true methods to address these impostors:
1. Pre-Emergent Herbicides for Preventing Weeds
To thwart the growth of grassy weeds like crabgrass and foxtail before they rear their heads, pre-emergent herbicides are your best ally. A highly recommended choice is Nitrophos Barricade, which effectively blocks the emergence of over three types of grass and broadleaf weeds. This preventive measure is particularly valuable in keeping your lawn pristine.
2. Post-Emergent Herbicides for Existing Weeds
In the event that grassy weeds have already infiltrated your lawn, a post-emergent herbicide is the way to go. Quinclorac stands out as an excellent post-emergent solution for swiftly eliminating these unwanted intruders, delivering impressive results in the process.
The Significance of Preventative Weed Control
Emphasizing preventative weed control is the key to warding off these unsightly invaders. By taking proactive measures, you can halt weed growth before it begins. Regular weed control not only preserves the beauty of your lawn but also ensures that your grass and desired plants have unhindered access to essential resources for healthy growth.
For instance, when you apply fertilizer, weeds tend to outcompete your grass for the valuable nutrients meant to nurture your lawn’s lushness. Moreover, preventing weeds from taking root also acts as a defense against pests and diseases, as they often weaken your grass plants.
FAQs
Q: What Are the Tall Weeds That Resemble Grass?
A: Several tall weeds closely mimic the appearance of grass, including crabgrass, quackgrass, and nutsedge. These crafty impostors are known for their rapid growth and aggressive spread, which can smother your grass and other desirable plant species in your lawn.
Final Considerations
In conclusion, various troublesome weeds can cunningly disguise themselves as grass on your lawn. Before applying any treatment, it is crucial to identify the specific type of weed and assess the extent of the damage. Armed with this knowledge, you can choose the right herbicide and take effective action to restore your lawn’s natural beauty.