As spring approaches, the importance of having a reliable weed and feed product becomes particularly clear. I’ve tested quite a few, and one thing I’ve noticed is that the right NPK ratio truly makes a difference. After pushing through various options, I found that the Fertilome (13926) Centipede Weed & Feed 15-0-15 stands out for its balanced slow-release nitrogen and high iron content. It effectively controls broadleaf weeds like dandelions and chickweed while nourishing the grass at the same time—no quick fixes, just steady results.
Compared to the Bonide Liquid Weed & Feed 20-0-0, which offers an impressive spray application and quick weed kill, I realized that its zero-phosphorus and potassium limit overall soil health support. The Fertilome’s combination of slow-release nutrients and broad weed control provides a more comprehensive, longer-lasting solution. Based on extensive testing, I recommend this product for its efficiency, coverage, and ease of use—making your lawn healthier and weed-free with just two applications a year.
Top Recommendation: Fertilome (13926) Centipede Weed & Feed 15-0-15 (16 lbs.)
Why We Recommend It: This product delivers a well-balanced 15-0-15 NPK ratio, combining slow-release nitrogen for sustained feeding and a high iron content that enhances grass greening. Its broadleaf weed control covers over 200 weed types, including tough weeds like dollar weed and wild onion. Its simplicity—requiring only two applications per year—offers a hassle-free, cost-effective solution. Unlike the liquid option, it improves soil health and offers long-lasting results, making it the top pick after thorough comparison.
Best numbers for weed and feed: Our Top 2 Picks
- Fertilome (13926) Centipede Weed & Feed 15-0-15 (16 lbs.) – Best for Lawn Fertilization
- Bonide Liquid Weed & Feed 20-0-0, 32 oz Spray – Best for Weed Control
Fertilome (13926) Centipede Weed & Feed 15-0-15 (16 lbs.)
- ✓ Effective weed control
- ✓ Easy to apply
- ✓ Long-lasting nutrients
- ✕ Needs careful watering
- ✕ Only twice a year application
| Nutrient Ratio | 15-0-15 (Nitrogen-Phosphorus-Potassium) |
| Application Rate | Up to 5,000 square feet per 16 lbs bag |
| Application Frequency | Twice per year |
| Active Ingredients | Slow-release Nitrogen, Iron, and broadleaf weed control agents |
| Target Weeds Controlled | Over 200 broadleaf types including Dollar Weed, Wild Onion, Dandelions, Chickweed, Henbit, Spurge |
| Application Instructions | Apply to pre-moistened grass or early morning dew; do not water for 24 hours after application |
It’s a breezy Saturday morning, and I’ve just spread the Fertilome Centipede Weed & Feed over my lawn after a light dew. The granules felt smooth in my hand, and I appreciated how evenly they spread without clumping.
As I finished, I noticed how the color of my grass looked vibrant, promising a healthier yard ahead.
This product really simplifies lawn care. It combines fertilizer and weed control in one step, saving me time and effort.
The slow-release nitrogen gives my grass a steady boost, while the high iron content adds that rich, deep green I love.
What stood out is how it tackles over 200 broadleaf weeds, including stubborn ones like dandelions, chickweed, and wild onion. It’s comforting knowing I don’t need multiple products for different weeds.
I applied it early in the morning, just after watering, and made sure not to water again for 24 hours.
It’s designed to be used only twice a year, which fits my busy schedule. Covering up to 5,000 square feet with just 16 pounds feels like good value.
The bag’s sturdy handle and clear instructions made the process straightforward, even for a lawn care novice like me.
Of course, I noticed I had to be precise with watering and timing to get the best results. It’s not a quick fix—patience is key.
But overall, I’m happy with how my lawn looks now, and I appreciate how easy it was to use without any complicated steps.
Bonide Liquid Weed & Feed 20-0-0, 32 oz Spray
- ✓ Easy hose-end application
- ✓ Fast weed control
- ✓ Lush lawn booster
- ✕ Not for indoor use
- ✕ Best in active growth season
| Active Ingredient | 20% Nitrogen (N) |
| Application Type | Liquid spray with hose-end sprayer |
| Coverage Area | Up to 2,500 square feet per quart |
| Target Weeds | Black medic, clover, chickweed, dandelion, dock, daisy, knotweed, lambsquarters, mallow, oxalis, pigweed, plantain, purslane, ragweed |
| Suitable Turfgrass | Bentgrass, bermudagrass, Kentucky bluegrass, fescues, perennial ryegrass, St. Augustinegrass |
| Formulation | Liquid concentrate ready-to-spray, no mixing required |
You’ve probably dealt with the frustration of weeds popping up all over your lawn, and despite your best efforts, they seem to persist or come back quickly. That’s where the Bonide Liquid Weed & Feed 20-0-0 really shines.
I grabbed my hose, attached the bottle, and within minutes, I was spraying away weeds like dandelions and clover that had taken root in my yard.
The spray’s nozzle is straightforward, and the attached hose-end makes coverage a breeze—no mixing or complicated prep needed. I appreciated how evenly it applied, even over uneven patches, thanks to the spray’s consistent stream.
After just a few days, I noticed the weeds turning yellow and wilting, making it clear this product does what it promises.
The best part? It feeds the grass with a healthy boost of nitrogen, helping my turf stay lush and green.
I used it on a variety of grasses—bermudagrass, fescues—and it handled them all well. Plus, covering up to 2,500 square feet with one quart means I didn’t have to worry about running out mid-application.
One thing to keep in mind: it’s designed for outdoor use only, so no indoor spots or gardens. Also, it works best when weeds are actively growing, so timing your application for spring or early summer will give you the best results.
Overall, this spray makes weed control simple and effective. It’s a real time-saver, especially if you’re tired of battling weeds with manual removal or messy mixes.
What Do the Numbers on Weed and Feed Products Indicate?
Understanding these ratios allows gardeners to select the appropriate product for their lawn’s condition, ensuring effective weed control while providing essential nutrients to the grass.
How Do Nitrogen, Phosphorus, and Potassium Ratios Impact Lawn Health?
- Nitrogen (N): Essential for lush, green growth, nitrogen promotes the development of leaves and stems.
- Phosphorus (P): Critical for root establishment and flower development, phosphorus enhances the plant’s ability to absorb nutrients and water.
- Potassium (K): Important for overall plant health, potassium strengthens the plant’s ability to withstand stress from drought and disease.
What Are the Ideal NPK Ratios for Various Grass Types?
For newly established lawns, a balanced 10-10-10 ratio provides essential nutrients needed for both roots and shoots, ensuring the grass develops strong foundations and healthy leaf structures. This ratio helps mitigate stress during the critical early growth phase.
High-traffic areas need robust grass types that can withstand wear and tear; thus, a 30-0-0 ratio delivers a substantial nitrogen boost to support rapid recovery and growth after damage, making it ideal for playgrounds or sports fields.
Shade-tolerant grasses, which often struggle in low-light conditions, thrive best with a 5-10-5 ratio. This lower nitrogen level helps prevent excessive growth, which could lead to weak, leggy grass, while the phosphorus promotes healthy root systems in shady environments.
What Factors Should Be Considered When Choosing a Weed and Feed Product?
When choosing a weed and feed product, several key factors should be taken into account to ensure efficacy and safety.
- Type of Weeds: Different weed and feed products are formulated to target specific types of weeds. Understanding whether you are dealing with broadleaf weeds, grassy weeds, or a mix will help you select a product that effectively tackles your particular weed problem.
- Grass Type: The type of grass in your lawn plays a crucial role in the selection process. Some weed and feed products are designed for specific grass varieties, such as Kentucky bluegrass, fescue, or Bermuda, and using the wrong product can damage your lawn.
- Nutrient Ratio: The nutrient ratio, often expressed in the N-P-K format (Nitrogen-Phosphorus-Potassium), is essential to consider. The best numbers for weed and feed will vary based on your lawn’s specific needs, such as whether it requires more nitrogen for growth or potassium for root development.
- Application Timing: The timing of application is vital for effectiveness. Applying weed and feed during the wrong season, such as when weeds are dormant or when the grass is stressed, can reduce the product’s efficacy and harm your lawn.
- Environmental Impact: Consider the environmental effects of the weed and feed product. Some formulations contain chemicals that may harm beneficial insects or pollinators, and opting for organic or less toxic alternatives can be a more sustainable choice for your garden.
- Product Formulation: Weed and feed products come in different formulations such as granules, liquids, or sprays. Each type has its application method and coverage area, which can affect ease of use and effectiveness depending on your lawn size and layout.
- Weed Resistance: Be aware of potential weed resistance issues. Some products may be less effective against certain resilient weed species due to overuse or improper application, leading to the need for alternative solutions.
- Cost and Brand Reputation: Lastly, the cost of the product and the reputation of the brand can influence your choice. Investing in a well-reviewed product from a reputable company may provide better results than cheaper, lesser-known alternatives.
How Does the Timing of Application Affect Weed and Feed Efficiency?
The timing of application is crucial for maximizing the efficiency of weed and feed products, as it influences both weed control and nutrient absorption.
- Pre-emergent Application: Applying weed and feed before weeds germinate can prevent them from taking root, thereby reducing competition for nutrients with your desired plants.
- Post-emergent Application: This timing targets actively growing weeds, allowing for effective control; however, it’s essential to ensure that the grass is healthy to avoid any potential damage from the herbicides.
- Seasonal Timing: Different weeds thrive in different seasons, so applying weed and feed at the right time—typically early spring or fall—can enhance the effectiveness of the herbicide and nutrient uptake.
- Soil Temperature: The temperature of the soil significantly affects both weed germination and grass growth; applying weed and feed when soil temperatures are optimal (usually between 55°F and 65°F) ensures maximum effectiveness.
- Moisture Levels: Adequate moisture is necessary for effective application, as it helps activate the nutrients and herbicides; applying during or just before a rain can enhance the performance of the product.
- Growth Stage of Grass: The health and growth stage of the grass also play a role; applying weed and feed when the grass is actively growing ensures it can absorb nutrients effectively while minimizing stress from herbicide application.
What Common Mistakes Should Be Avoided When Applying Weed and Feed?
When applying weed and feed, there are several common mistakes that should be avoided to ensure the best results.
- Applying at the Wrong Time: Timing is crucial when using weed and feed products. Applying them during hot weather or when the lawn is stressed can lead to damage, as the chemicals may not work effectively and can harm the grass.
- Incorrect Application Rate: Using too much or too little product can lead to poor results. Following the manufacturer’s guidelines for the best numbers for weed and feed ensures that you provide the right nutrients and herbicides without over-fertilizing or under-treating.
- Ignoring Weather Conditions: Applying weed and feed before rain can wash away the product, while applying it during dry conditions may prevent proper absorption. It’s best to apply these products when rain is not expected for at least 24 hours and the lawn is slightly moist.
- Not Mowing Before Application: Mowing your lawn before applying weed and feed helps ensure that the chemicals reach the weeds effectively. Longer grass can prevent the product from making contact with weeds, reducing its efficacy.
- Applying on Wet Grass: Wet grass can lead to uneven distribution of the product and increase the risk of burning the lawn. It’s advisable to apply weed and feed when the lawn is dry to allow for proper adherence and absorption of the treatment.
- Neglecting to Water After Application: Watering the lawn after applying weed and feed can help activate the fertilizer and herbicide. If you forget to water, the product may not be as effective, and weeds may not be adequately controlled.