How to Use a Lawn Spreader Without Stripes, Burns or Wasted Product

In this guide

1. Broadcast vs. drop spreaders
2. Step 1: know your lawn's size
3. Step 2: work out how much product you need
4. Step 3: start with the bag setting, then check it
5. Step 4: the walking pattern
6. Step 5: clean up
7. Using a spreader for seed and lime
8. Common mistakes to avoid

A bag of fertilizer, seed, lime or grub control is only as good as the way it goes down. Spread it too heavy and you get burned stripes or runoff. Too light and you've wasted a Saturday. Uneven and you get the classic green-and-yellow zebra lawn. The fix isn't an expensive spreader. It's knowing a few simple things about the one you have.

Broadcast vs. drop spreaders

For most Northeast home lawns, a decent walk-behind broadcast spreader is the best all-around choice. Handheld spreaders work for small yards and patching, but they're hard to apply evenly over a whole lawn.

Step 1: know your lawn's size

Every rate on a bag is given per 1,000 square feet, so you need to know your lawn's area. Measure each rectangle of lawn with a tape measure or a measuring wheel, multiply length by width, and add them up. Subtract big beds, the driveway and the patio. Many free online map tools also let you trace your yard and measure it.

Write the number down somewhere you'll find it next year. It doesn't change, and you'll use it for every product.

Step 2: work out how much product you need

For seed, lime and most pest products, the bag tells you the rate directly in pounds per 1,000 square feet. For fertilizer, you'll often be working from a target amount of nitrogen, such as the rates in our fertilizer schedule.

The first number on a fertilizer bag is the percentage of nitrogen by weight. To find out how much product supplies a given amount of nitrogen:

Pounds of product per 1,000 sq ft = pounds of nitrogen wanted ÷ (nitrogen % ÷ 100)

A worked example: you want 0.75 pound of nitrogen per 1,000 square feet, and your bag is a 24-0-6.

• 0.75 ÷ 0.24 = about 3.1 pounds of product per 1,000 square feet
• For a 6,000 square foot lawn: 3.1 × 6 = about 19 pounds of product in total

Now you know roughly how much should be gone from the bag when you're finished. That's your built-in accuracy check.

Step 3: start with the bag setting, then check it

Most bags list settings for popular spreader models. Treat those as a starting point, not gospel. Spreader settings drift, walking speed varies, and humidity changes how granules flow.

A simple calibration check:

1. Measure out a test area of 1,000 square feet of lawn (for example, 20 by 50 feet).
2. Weigh a bucket of product on a bathroom scale (weigh yourself holding the bucket, then subtract your weight), or fill the hopper to a marked line.
3. Spread the test area at your normal walking pace with the bag's setting.
4. Weigh what's left (or measure how much it takes to refill to the line).
5. Compare what you used to the target rate. If you used too much, close the setting down a notch; too little, open it up. Repeat until it's close.

You don't need to do this every time, but it's worth it once for each spreader and each type of product you use often.

Step 4: the walking pattern

1. Fill the spreader on the driveway or a tarp, not on the lawn. A spilled pile of fertilizer will burn a dead patch.
2. Do the perimeter first. Make one or two "header strip" passes around the outside edge of the lawn. These give you room to turn around at the ends without double-dosing.
3. Walk straight lines back and forth across the lawn between the header strips, at a steady, normal pace.
4. Overlap correctly. With a broadcast spreader, aim for each pass to reach the edge of the previous pass's throw (often called wheel-to-wheel or edge-to-edge, depending on the model; check your spreader's manual). With a drop spreader, overlap the wheel tracks slightly so there's no gap.
5. Close the hopper whenever you stop, turn or slow down. Product keeps flowing if the spreader is open and stationary.

The half-rate trick: for the most even result, set the spreader to deliver half the rate and cover the whole lawn twice, the second time at a right angle to the first. Any small gaps or overlaps from the first pass get evened out by the second. It takes longer but nearly eliminates stripes.

Step 5: clean up

• Sweep or blow any granules off the driveway, sidewalk and street back onto the lawn. Fertilizer on pavement washes into storm drains and local waterways, and some states require you to clean it up.
• Water it in if the label says to. Many fertilizers and grub products need about a quarter to half an inch of water.
• Empty and rinse the spreader and let it dry before storing it. Fertilizer is corrosive and will seize the gears and the gate over time.

Using a spreader for seed and lime

• Seed flows very differently from fertilizer. Use the seed bag's setting and do the half-rate, two-direction method for even coverage. See the fall seeding guide.
• Pelletized lime is heavy and flows quickly. Expect to refill often and go slowly. See soil pH and lime.

Common mistakes to avoid

• Filling the spreader on the grass. One spill means one dead spot.
• Leaving the hopper open while stopped or turning.
• Skipping the header strips, which doubles up product at the ends of every pass.
• Spreading on a windy day, especially with a broadcast spreader.
• Throwing product into beds and onto the driveway. Many broadcast spreaders have an edge guard or deflector; use it along hard edges.
• Not knowing your square footage, so you never know if you used the right amount.
• Storing it dirty. Rinse and dry after every use.

Get these right and every product you buy works better, which means fewer products and less money spent over the year. For when to put each one down, see the lawn calendar.

Free · monthly-ish

Get the checklist before the window closes

A reminder email a week or two before each key window — fall seeding, fall feeding, winterizing — so you don't find out you missed it.

Email address Subscribe