Spring is the time when many homeowners start looking for ways to make their lawns greener and control weeds that appeared during winter. Weed-and-feed products offer a convenient solution by combining lawn fertilizer with weed control in a single application. However, the best weed and feed for spring depends on your grass type, the weeds you want to control, and the timing of your application.
Choosing the right product is only part of the process. Applying it too early, using it on unsuitable grass, or combining it with other lawn treatments at the wrong time can reduce its effectiveness or damage your lawn.
This guide explains how spring weed-and-feed products work, which options to consider, when to apply them, and how to maintain a healthier lawn throughout the growing season.
What Is Weed and Feed?
Weed and feed is a lawn-care product that combines fertilizer with a herbicide. The fertilizer supplies nutrients that support grass growth, while the herbicide targets particular weeds.
Most products are designed to address one of two weed-control needs:
- Post-emergent weed control: Targets weeds that are already growing, such as dandelions and clover.
- Pre-emergent weed control: Helps prevent selected weeds from establishing by stopping seeds from germinating or seedlings from developing.
These products are not interchangeable. A weed-and-feed product that controls existing broadleaf weeds may not prevent crabgrass, while a spring fertilizer with crabgrass preventer may not eliminate established dandelions.
Before buying a product, identify the weeds in your lawn and determine whether you need to control existing growth, prevent new weeds, or address both problems separately.
Is Spring the Best Time to Apply Weed and Feed?
Spring can be suitable for certain weed-and-feed products, but it is not automatically the best time for every lawn treatment.
The ideal application window depends on the active ingredients and whether the product targets existing weeds or prevents germination.
For example, crabgrass preventers must generally be applied before crabgrass germinates. In Illinois, crabgrass germination is associated with soil temperatures reaching approximately 55–60°F for several consecutive days. Applying a suitable pre-emergent before that period is important.
Products designed to kill existing broadleaf weeds have different requirements. Some granular weed-and-feed products need moisture on the grass so the granules adhere to weed leaves, along with suitable daytime temperatures for effective treatment.
Fertilizer timing also matters. Illinois Extension generally recommends waiting until around mid-May for spring fertilization of established cool-season lawns rather than applying nitrogen fertilizer too early.
This creates a timing challenge for combination products: the ideal period for crabgrass prevention may arrive before the ideal period for fertilizing cool-season grass.
For this reason, applying a separate crabgrass preventer and fertilizing later may be more effective than relying on one combination product.
Best Weed and Feed Products to Consider for Spring
The right product depends on the weeds you need to control, your grass species, and whether you need fertilizer at the same time.
The following products are options to investigate. Check the current product label, formulation, local availability, and grass-type restrictions before purchasing.
| Product | Best suited for | Important consideration |
| Scotts Turf Builder Weed & Feed₅ | Existing broadleaf weeds alongside lawn feeding | Apply to a wet lawn when weeds are actively growing and daytime temperatures are consistently between 60°F and 90°F, subject to the current label. |
| Pennington UltraGreen Weed and Feed | Homeowners looking for combined broadleaf weed control and fertilization | Confirm the current formulation, application instructions, and suitability for your grass type. |
| GreenView Fairway Formula Spring Fertilizer with Crabgrass Preventer | Spring feeding combined with prevention of selected weeds, including crabgrass | Check the current product label for application timing and the weeds controlled. |
| BioAdvanced All-In-One Lawn Weed & Crabgrass Killer | Targeted weed control, including certain broadleaf weeds and crabgrass | This is a weed-control product, not a substitute for a complete lawn fertilizer. Check the label for application and grass restrictions. |
| LESCO professional lawn-care products | Homeowners or professionals seeking products for specific lawn-care requirements | LESCO offers different formulations. Select the product based on the target weed, nutrient requirements, and label instructions. |
Product availability and prices vary by retailer and location. A manufacturer’s product page does not guarantee that a particular formulation is stocked by a local store.
1. Scotts Turf Builder Weed & Feed₅
Scotts Turf Builder Weed & Feed₅ combines fertilizer with a post-emergent herbicide designed to control listed broadleaf weeds, including dandelions and clover.
It may be worth considering if your lawn has visible weeds that are actively growing and also needs feeding.
However, timing is essential. The manufacturer specifies application to a wet lawn when weeds are actively growing and daytime temperatures are consistently between 60°F and 90°F. The product should only be used on grass types listed on its label.
Do not assume it is the right option for preventing crabgrass. A product intended to kill existing weeds does not necessarily provide the same protection as a dedicated pre-emergent treatment.
2. Pennington UltraGreen Weed and Feed
Pennington UltraGreen Weed and Feed is another combination product to consider when you want to address lawn weeds and fertilization together.
Before choosing it, review the exact product formulation available to you. Product names and formulations can vary, so confirm which weeds it controls, the nutrient analysis, the suitable grass types, and the application conditions.
As with any weed-and-feed product, avoid applying it simply because the weather has started warming up. The lawn should be at the appropriate growth stage, and the label’s temperature and moisture requirements must be met.
3. GreenView Fairway Formula Spring Fertilizer with Crabgrass Preventer
A spring fertilizer containing crabgrass preventer serves a different purpose from a product designed primarily to kill visible broadleaf weeds.
It is intended to provide nutrients while helping prevent crabgrass from establishing. This makes application timing especially important because the preventive ingredient must be applied before the target weed germinates.
If crabgrass prevention is your main concern, compare this type of product with a standalone pre-emergent herbicide. A separate application can give you more flexibility to time weed prevention and fertilizer according to the lawn’s needs.
4. BioAdvanced All-In-One Lawn Weed & Crabgrass Killer
A targeted weed killer can be useful when your main concern is controlling weeds rather than feeding the grass.
BioAdvanced All-In-One Lawn Weed & Crabgrass Killer is an example of a product to evaluate for listed weed-control needs. However, it should not be treated as a complete fertilizer.
If your lawn also needs nutrients, choose a suitable fertilizer separately and follow the timing instructions for both products. Do not combine treatments unless their labels permit the proposed application schedule.
5. LESCO Professional Lawn-Care Products
LESCO offers lawn-care products for different weed-control and fertilization needs. Its range may be useful when you need a formulation suited to a specific problem rather than a general-purpose combination product.
Check the exact product label before purchasing. Professional product ranges include different active ingredients and nutrient formulations, and not every product is appropriate for every residential lawn.
When Should You Apply Weed and Feed in Spring?
There is no single application date that works for every lawn. The best timing depends on the product, your local conditions, your grass species, and the weeds you are targeting.
Early Spring: Focus on Crabgrass Prevention
If crabgrass was a problem last year, early spring may be the appropriate period to apply a suitable pre-emergent herbicide.
Crabgrass generally begins germinating when soil temperatures remain around 55–60°F for several consecutive days. The goal is to apply the preventive product before germination, allowing it to form the intended barrier in the soil.
Do not use air temperature alone to decide when to apply it. Monitor soil temperatures and local seasonal conditions.
Also check whether the product is compatible with plans to overseed. Some pre-emergent herbicides interfere with grass-seed establishment.
Mid-to-Late Spring: Assess Existing Weeds and Fertilizer Needs
As the lawn begins growing actively, inspect it for dandelions, clover, plantain, and other weeds.
If you are using a post-emergent weed-and-feed product, make sure the target weeds are actively growing and that temperatures and moisture conditions meet the product’s instructions.
For established cool-season lawns in Illinois, avoid assuming that early spring is the ideal time for fertilizer. Illinois Extension generally recommends waiting until around mid-May for spring fertilization.
If your priority is crabgrass prevention, using a separate pre-emergent product and applying fertilizer later may allow you to time each treatment more appropriately.
Before Applying: Check the Weather and Lawn Conditions
Before treating your lawn, confirm the following:
- The product is approved for your grass species.
- The target weeds are listed on the label.
- The lawn is at the appropriate stage of growth.
- Temperatures meet the product’s requirements.
- Rain and watering conditions comply with the instructions.
- You are not applying more fertilizer or herbicide than the label permits.
- You understand any restrictions on reseeding, mowing, irrigation, or access to the treated area.
Never assume that all weed-and-feed products require the same waiting period before rain or the same restrictions for children and pets. Follow the specific product label.
Choosing Weed and Feed for Different Grass Types
Your grass species matters because herbicides that are safe for one type of turf may damage another.
Kentucky Bluegrass
Kentucky bluegrass is a cool-season grass commonly found in Illinois. For established lawns, choose products specifically labelled for Kentucky bluegrass.
Spring is a useful time to assess weed pressure, but avoid unnecessary early nitrogen applications. If crabgrass prevention is required, consider whether a separate pre-emergent treatment will provide better timing.
Perennial Ryegrass
Perennial ryegrass is another cool-season grass. Confirm that the selected product lists ryegrass as a suitable species and follow the label’s application instructions.
Avoid applying herbicides to newly seeded areas unless the label specifically allows it.
Tall and Fine Fescue
Fescue lawns may benefit from targeted weed control, but product suitability varies by formulation. Check whether the label covers the particular fescue type in your lawn.
If your lawn is thin or stressed, address the underlying growing conditions before relying on fertilizer and herbicides to improve its appearance.
Bermudagrass
Bermudagrass is a warm-season grass. Its seasonal growth pattern differs from that of cool-season lawns, so the appropriate treatment window may be different.
Use only products labelled for Bermudagrass and avoid applying treatments while the grass is dormant or under conditions prohibited by the label.
St. Augustinegrass and Other Sensitive Grasses
Some commonly available weed-and-feed products are not suitable for St. Augustinegrass, creeping bentgrass, or other sensitive turf species.
Never assume that a product is safe because it is marketed for lawns generally. Confirm that your exact grass type is listed as an approved use.
How to Apply Weed and Feed Correctly
Even a suitable product may perform poorly when applied incorrectly. Use the following steps to improve consistency and avoid unnecessary lawn damage.
1. Identify Your Grass and Weeds
Start by identifying the grass species and the weeds you want to control. This helps you select a product that is appropriate for the lawn and targets the problem you actually have.
If you are unsure which weeds are present, seek advice from a local lawn-care professional or garden centre before choosing a herbicide.
2. Read the Entire Product Label
Check the active ingredients, coverage, spreader settings, temperature requirements, watering instructions, and restrictions.
Pay attention to warnings about sensitive grass types, newly seeded lawns, nearby plants, and the maximum number of applications allowed.
3. Measure the Lawn Area
Calculate the area you intend to treat so you can apply the recommended amount.
Using too much product does not necessarily improve results. Excessive fertilizer or herbicide can injure the lawn and increase the risk of runoff.
4. Apply Evenly
Use the spreader type and setting recommended by the manufacturer. Walk at a consistent pace and follow the application pattern specified on the label.
Avoid overlapping passes excessively or spreading granules onto driveways, sidewalks, garden beds, or other areas where they are not intended to be applied.
5. Follow Watering and Weather Instructions
Some granular products require a wet lawn so the granules adhere to weed leaves. Others require watering after application to activate a preventive ingredient.
These instructions can differ significantly. Follow the specific product label rather than using a general watering rule.
Avoid application when conditions could carry the product into storm drains, waterways, or neighbouring areas.
6. Keep People and Pets Away as Directed
Follow the label’s re-entry and safety instructions. Store unused products securely, wash your hands after handling them, and clean application equipment according to the manufacturer’s directions.
Do not allow product granules to remain on hard surfaces where they can be washed into drainage systems.
Common Weed-and-Feed Mistakes to Avoid
Applying Too Early
Applying fertilizer before cool-season grass is ready for active growth can encourage excessive top growth without providing the best support for root development.
For crabgrass prevention, however, waiting too long can allow the weed to germinate before the preventive product is applied. This is one reason separate treatments can be useful.
Using the Wrong Product for the Weed
A broadleaf weed killer may not prevent crabgrass. A crabgrass preventer may not eliminate established dandelions.
Identify the target weed and choose a product whose label specifically lists it.
Ignoring Grass-Type Restrictions
A product that works on Kentucky bluegrass may not be suitable for every lawn species. Always check the label before applying a herbicide.
Applying Too Much Fertilizer
Excessive fertilizer can damage turf, contribute to nutrient runoff, and create unnecessary maintenance problems. Measure the lawn area and apply only the recommended amount.
Applying Before Rain Without Checking the Label
Rain can affect performance differently depending on the product. Some treatments need time to adhere to leaves; others have specific watering requirements.
Check the forecast and follow the label’s rain and watering restrictions.
Treating Weeds Without Improving Lawn Health
Weeds often become established where grass is thin or growing poorly. Even when a herbicide works, weeds may return if the underlying lawn conditions remain unchanged.
Appropriate mowing, watering, soil management, and seasonal maintenance help create a thicker lawn that competes more effectively with weeds. For related maintenance advice.
Alternatives to Traditional Weed and Feed
You do not always need a combination herbicide and fertilizer to improve your lawn. Depending on the problem, separate treatments or non-chemical approaches may be more appropriate.
Use a Separate Fertilizer and Weed Treatment
Applying fertilizer and weed control separately gives you greater flexibility over timing. You can apply a crabgrass preventer before germination and fertilize cool-season grass later when conditions are more suitable.
This approach can be especially useful in Illinois, where the ideal timing for crabgrass prevention may not align with the recommended timing for spring fertilization.
Improve Lawn Density
A dense, healthy lawn can make it more difficult for weeds to establish. Choose grass seed suited to your lawn’s conditions, and address bare patches when seasonal conditions are appropriate.
Before overseeding, check whether any herbicide already applied could interfere with seed germination.
Remove Small Weeds Manually
Hand-pulling or using a suitable weed-removal tool can work for isolated weeds, particularly when the soil is moist and the root can be removed.
For widespread infestations, manual removal may require repeated effort.
Improve Mowing and Watering Practices
Mow at the appropriate height for your grass species and avoid removing too much leaf growth at once. Water according to the lawn’s needs rather than relying on frequent, shallow watering.
Consistent maintenance can support stronger turf and reduce opportunities for weeds to spread.
Address Drainage and Soil Problems
Poor drainage, compacted soil, and persistent wet areas can weaken turf and contribute to patchy growth.
If water regularly pools in your yard, how to get rid of standing water in your yard. Correcting drainage problems may be an important part of improving the lawn’s long-term condition.
Illinois Rules and Responsible Lawn-Care Practices
Homeowners in Illinois should consider state fertilizer requirements and pesticide-label restrictions when planning lawn treatments.
Illinois has restrictions on phosphorus-containing lawn fertilizer applications by professional lawn-care providers, subject to applicable exceptions. Soil-test results and the circumstances of the application can affect whether phosphorus may be used.
Commercial pesticide applications are also subject to applicable licensing and regulatory requirements. If you hire a lawn-care company, ask whether the provider is properly qualified for the services being offered.
Regardless of who applies the product, follow its label, avoid excessive application, and take care to prevent fertilizer and herbicides from entering storm drains or waterways.
Frequently Asked Questions
What is the best weed and feed for spring?
The best product depends on your grass type and the weeds you need to control. Scotts Turf Builder Weed & Feed₅ is one option for listed existing broadleaf weeds, while a spring fertilizer with crabgrass preventer serves a different purpose. Compare the product labels before choosing.
Can I apply weed and feed in early spring?
Some products are intended for early-spring application, particularly those designed to prevent crabgrass. Others require actively growing weeds and specific temperature conditions. Follow the instructions for the exact product you plan to use.
Should I fertilize my lawn before applying weed and feed?
Not necessarily. Weed-and-feed products already contain fertilizer, so an additional fertilizer application could result in overapplication. Check the nutrient analysis and calculate the amount your lawn needs before applying another product.
Does weed and feed kill crabgrass?
Some products prevent crabgrass from germinating, while other herbicides target crabgrass after it emerges. A product that kills broadleaf weeds does not automatically provide crabgrass control. Confirm the target weeds and application stage on the label.
Can I use weed and feed on newly seeded grass?
Many products restrict use on newly seeded lawns or require a waiting period before or after seeding. Some pre-emergent herbicides can prevent desirable grass seed from germinating. Read the label before treating a lawn that has recently been seeded.
Is weed and feed safe for pets?
Safety depends on the product, its ingredients, and how it is applied. Follow all label precautions, including instructions about keeping pets away from treated areas and when they may return.
How often should I apply weed and feed?
Follow the product’s maximum application frequency and annual limits. More frequent applications are not automatically more effective and can damage turf or lead to excess nutrient use.
Can I use weed and feed instead of regular lawn fertilizer?
A weed-and-feed product supplies fertilizer, but its nutrient formulation and application timing may not match your lawn’s needs. In some cases, separate weed control and fertilization provide better control over both treatments.
Keep Your Lawn Healthy Beyond Spring
Choosing the best weed and feed for spring begins with understanding the weeds in your lawn, identifying your grass species, and selecting a product that matches your needs. Application timing matters just as much as product choice, particularly when you are trying to balance crabgrass prevention with fertilizer requirements.
For many Illinois homeowners, separating early-spring crabgrass prevention from later fertilizer application may produce a more practical lawn-care schedule. Whatever approach you choose, follow the product label and support weed control with consistent mowing, suitable watering, and attention to drainage.
If your lawn continues to struggle with poor growth, recurring bare patches, or drainage issues, addressing the underlying cause can be more effective than repeatedly applying weed-control products.
Need help maintaining a healthier lawn? Ware Landscaping’s lawn mowing services and landscape drainage solutions to learn more about caring for your outdoor space
