When to Apply Scotts Step 1 Fertilizer

February through April is the recommended application window for Scotts STEP 1 Crabgrass Preventer Plus Lawn Food, according to Scotts, but lawn growth and local fertilizer restrictions determine the right date for your yard. The goal is to prevent crabgrass before it emerges while feeding grass that can use the nutrients. Check your grass type, local rules, and soil conditions before choosing an application day.

What Scotts Step 1 Does

Scotts STEP 1 combines lawn fertilizer with crabgrass prevention before germination. The fertilizer supports spring growth; the herbicide controls crabgrass as it germinates, before you see established plants above ground.

That combination creates a timing challenge. Crabgrass prevention may be needed before the lawn is ready for fertilizer. Applying nitrogen to dormant or barely growing turf increases the risk of nutrient loss, according to NYS DEC’s fertilizer-timing guidance.

The right application date is where active lawn growth, crabgrass-prevention timing, and local fertilizer rules overlap.

If those conditions do not line up, separating weed prevention from fertilizing is a better option than forcing both jobs onto the same date.

How to Choose a Date and Apply Scotts Step 1

Choose a treatment that fits your lawn’s fertilizer needs, crabgrass problems, and seeding plans:

Your Lawn’s Situation	Best Starting Choice
Established lawn with recurring crabgrass and a need for spring fertilizer	Consider regular STEP 1 if your grass type is suitable.
Crabgrass prevention is due, but the lawn is still dormant	Consider a separate crabgrass preventer and fertilize later.
Seeding or overseeding is planned	Check the product directions before seeding or overseeding.
Weeds are already established	Identify them and choose control intended for existing weeds.

Step 1: Confirm the Product Fits Your Lawn

Read the complete product name. These directions concern regular Scotts STEP 1 Crabgrass Preventer Plus Lawn Food. A different product with “Step 1” in its name may contain a different herbicide or have different application restrictions.
Identify your lawn grass. Scotts STEP 1 Crabgrass Preventer Plus Lawn Food is not for use on dichondra or bentgrass lawns. If you are unsure what is growing, identify the grass before buying or spreading the product.
Decide whether you need both ingredients. A history of crabgrass is a reason to consider prevention; a lawn without that problem does not automatically need a broadcast herbicide. University of Minnesota Extension recommends using herbicides for specific weed problems rather than making them an automatic part of every fertilizer application.

Scotts lists its regular STEP 1 Crabgrass Preventer Plus Lawn Food as 28-0-7. That is its nitrogen–phosphate–potash analysis, so count the application toward your lawn’s fertilizer program rather than treating it as weed control alone. Consider soil-test recommendations, grass type, and previous feeding before adding more nutrients.

Step 2: Check Local Fertilizer Restrictions

Check the rules for the lawn’s address. State, county, and municipal restrictions can take precedence over a product’s broad seasonal calendar. Because STEP 1 contains fertilizer, fertilizer blackout periods matter even when your main goal is crabgrass prevention.
Do not apply STEP 1 during the fertilizer blackout period for your New York lawn’s location. NYS DEC’s fertilizer-timing guidance lists these no-application periods:

Location	No-Application Period
New York State	Between December 1 and April 1
Nassau County	Between November 15 and April 1
Suffolk County	Between November 1 and April 1

The end of a legal blackout period is permission to consider fertilizing, not proof that the soil or grass is ready.

Step 3: Match the Calendar to Lawn Growth and Weather

Use Scotts’ calendar as a starting window. For its regular STEP 1 Crabgrass Preventer Plus Lawn Food, Scotts recommends application between February and April while air temperatures remain below 80°F. Scotts also uses “on or before Easter” as its program reminder. Easter moves from year to year, so it is not a biological deadline.
Check whether the lawn is growing. Look for fresh grass growth rather than relying on a warm afternoon. The soil should have warmed and drained, not remain frozen, waterlogged, or too cold for meaningful growth. Soil temperatures below 55°F are a dormancy warning in NYS DEC’s Long Island fertilizer guidance. Treat that as a regional screening benchmark, not a universal on/off switch for every grass species; check local soil temperatures and local extension guidance.
Use a regional fallback when you cannot measure soil temperature. On Long Island, mid-April is a practical starting date when fertilizer is needed and soil temperature is not being measured, according to NYS DEC. Check actual growing conditions before spreading.
Choose a suitable forecast. Avoid applying to frozen or saturated ground or ahead of rain likely to cause runoff. A day below the product’s temperature limit is not enough by itself: the lawn must also be ready to use the fertilizer, and the crabgrass-prevention window must still be open.

For Northeast lawns, this means ignoring the temptation to apply simply because spring products have appeared in stores.

Step 4: Measure the Lawn and Set the Spreader

Measure the turf you will actually treat. Exclude driveways, sidewalks, vegetable beds, flower beds, and other non-lawn areas. Use the treated lawn area, not the property’s total lot size, to determine how much product you need.
Match the bag to that area. Scotts lists regular STEP 1 Crabgrass Preventer Plus Lawn Food in bag sizes covering 5,000 to 15,000 sq. ft. Check the Coverage Area and product label for the selected bag size; a larger bag is not an instruction to use more product on a smaller lawn.
Set your spreader to the selected bag’s setting for your exact spreader brand and model. Settings are not interchangeable between spreader brands or models, and a fertilizer’s nitrogen analysis is not its product application rate.

Before opening the bag, locate its application rate, protective-clothing requirements, water-in directions, and reentry instructions. Have the spreader and any necessary watering equipment ready so you can finish the application properly.

Step 5: Spread, Water In, and Finish Safely

Spread evenly at the bag’s specified application rate, using the walking pace and pass spacing specified for your spreader. Close the hopper when stopping or turning so granules do not pile up in one spot.
Keep the product on the intended turf. Do not broadcast lawn herbicide-fertilizer into garden beds or toward drains and waterways. Sweep granules off pavement back onto the intended lawn area without creating concentrated piles; do not hose them into the street.
Water after fertilizer application unless the label directs otherwise, following University of Minnesota Extension’s guidance. For regular STEP 1, use the watering amount and timing printed on your bag so you complete the product’s application process rather than leaving granules indefinitely on the surface.
Keep people and pets off the lawn during spreading and until the bag’s reentry requirements have been met. Close and store the remaining product in its original container, following its storage instructions.

Do not make an extra pass simply because the coverage is difficult to see. More product does not correct poor timing and can increase the risk of turf injury and nutrient loss.

When Regular Scotts Step 1 Is the Wrong Choice

Regular Scotts Step 1 is the wrong choice when fertilization timing differs from crabgrass prevention, seeding is planned, or crabgrass is already growing.

When Crabgrass Prevention Is Due Before Feeding

University of Minnesota Extension recommends separating crabgrass prevention from fertilization when their best application times differ. When crabgrass prevention is due before the lawn is ready for fertilizer, applying a combined product can increase the risk of nutrient loss.

Choose a standalone preventer labeled for your grass and target weed, and reserve fertilizer for an appropriate feeding period. Recurring crabgrass may be concentrated along driveways, sidewalks, or other thin, stressed areas rather than evenly distributed.

When You Plan to Seed or Overseed

A pre-emergent herbicide can interfere with desirable grass seedlings as well as weeds.

If spring seeding is your priority, choose a product explicitly labeled for use with the grass you are planting, or use a seeding plan without a pre-emergent herbicide. If regular STEP 1 has already been applied, establish the bag’s reseeding restriction before sowing seed.

The advertised crabgrass-control duration and the permitted reseeding interval are separate label instructions; do not assume one answers the other.

When Crabgrass Is Already Growing

Regular STEP 1 is not a rescue treatment for established crabgrass.

A late calendar date alone does not tell you whether all prevention value is lost, because crabgrass emergence varies with local conditions.

For an existing infestation, identify the grass weed first. Hand removal may be practical for scattered plants; larger problems may call for a treatment specifically labeled for established crabgrass and your lawn species. Keep that weed-control decision separate from whether the lawn needs more fertilizer.

How to Check Your Application and Plan Ahead

Immediately after application, check the job rather than looking for an instant change in the lawn:

The amount used matches the treated area and the bag’s application rate.
Granules are not sitting on pavement or in garden beds.
The required watering and reentry conditions have been met.
Remaining product is closed and stored appropriately.

Record the application date, product name, treated area, and amount used. That record helps prevent accidental repeat applications and makes later fertilizer planning more accurate.

For seasonal planning, Scotts rates regular STEP 1 Crabgrass Preventer Plus Lawn Food for up to 4 months of crabgrass prevention. That is a weed-control window, not a fertilizer reapplication interval or a guarantee of a weed-free lawn.

Evaluate prevention by watching for new crabgrass growth. If crabgrass appears, note where it occurs before deciding what to do next.

Once the application is complete, monitor the lawn and base later feeding or weed-control decisions on its condition, nutrient needs, and the relevant product restrictions, not simply the next date on a calendar.

Frequently Asked Questions

Should I Apply Scotts Step 1 Before or After Rain?

Either can work if the lawn meets the bag’s application conditions and you can complete its watering directions without runoff. Applying before gentle rain may help water the product into the soil; after rain, wait for saturated ground to drain. Avoid applying ahead of a downpour, and do not assume any forecast rainfall will supply the amount of water the product requires.

Can I Use Scotts Step 1 Directions for IFA or Turf-Line Step 1?

No: “Step 1” identifies a stage in a lawn-care program, not a standardized fertilizer or herbicide formula. Use the directions for the exact product you have. Scotts’ coverage, spreader settings, grass restrictions, and application timing are not automatically transferable to another brand.

Will Scotts Step 1 Kill Dandelions?

No: do not expect regular Scotts STEP 1 Crabgrass Preventer Plus Lawn Food to clear established dandelions, including when it is applied late in spring. Existing dandelions need a separate control decision, such as digging out scattered plants or using an appropriately labeled spot treatment. Another blanket fertilizer application is not the answer to an established broadleaf-weed problem.