A broadcast spreader setting between 4 and 6 works for most common grass seed varieties, but seed size and spreader model demand a calibration test before any full application.
For the full breakdown, see our best Grass Seed Broadcaster guide.
Set it too low and you leave bare patches; too high and you waste seed and money. The general broadcast spreader setting for grass seed falls between 4 and 6, but that’s a starting point, not a guarantee. Fine seeds like centipede need 3–5, while larger seeds like zoysia need 4–6.
Why A Single Setting Doesn’t Fit All
Spreader dials aren’t standardized. A setting of 5 on one Scotts model may deliver a different rate than a setting of 5 on an Earthway or Lesco. Seed size matters too—larger seed particles need a wider opening to flow evenly. If your seed bag lists a setting, start there. If it doesn’t, a common rule for unknown products is to set the dial to one-third of the full opening—for example, 5 on a 15-max dial, or 10 on a 30-mark dial.
| Grass Type / Scenario | Broadcast Setting | Drop Setting |
|---|---|---|
| General Rule (Most Varieties) | 4–6 | — |
| Centipede Grass | 3–5 | — |
| Zoysia Grass | 4–6 | — |
| High-Traffic Blends | 6–8 | 7–9 |
| Scotts Tall Fescue (Overseed, Rotary) | 7.5 | — |
| Scotts Tall Fescue (New Lawn, Rotary) | 18 | — |
| Scotts Tall Fescue (New Lawn, Drop) | — | 12.5 |
How To Calibrate Your Spreader In 8 Minutes
You’ll need a flat surface, a known weight of seed, and a way to weigh the leftovers.
Step 1: Mark a 100-square-foot test area on your driveway or a tarp—10 feet by 10 feet. Step 2: Fill the hopper with a known weight of seed (1 pound for small tests, 5–10 pounds for larger strips). Step 3: Set the dial to the recommended starting point—say 4 for most varieties. Step 4: Walk through the 100-square-foot area at your normal pace, opening the hopper only after crossing the start line. Step 5: Close the hopper at the finish line, then weigh whatever seed remains in the hopper. Step 6: Subtract the remaining weight from the starting weight. If you distributed 1 pound over 100 square feet, your application rate is 10 pounds per 1,000 square feet. Step 7: Repeat until the rate matches the seed bag’s recommendation.
Application Techniques That Matter
A properly calibrated spreader still delivers poor results if you walk the wrong pattern. Walk a crosshatch pattern for even coverage: apply half the desired rate in one direction (say, north-south), then the other half perpendicular (east-west).
Start moving before you open the hopper, and close it during turns to avoid double-application on edges. If you spot a spill, clean it off the surface immediately—don’t walk it into the lawn. Wash the entire spreader after every use.
FAQs
Can I use the same spreader setting for all seed types?
No. Fine seeds like centipede need a lower setting (3–5), while larger seeds like zoysia need a higher one (4–6). Blends with high traffic mixes often require 6–8. Always calibrate for the specific seed in your hopper.
What if my spreader’s dial doesn’t match anything on the chart?
Start with the general rule: set the dial to one-third of the maximum. If your dial goes up to 30, start at 10. Then run a calibration test on a measured area and adjust up or down until your application rate matches the seed bag’s target.
How do I avoid stripes from my spreader passes?
References & Sources
- Scotts Miracle-Gro. “How To Find Your Spreader Settings” Official settings guide for Scotts spreaders and seed products.