How Much Fertilizer Per 1,000 Sq Ft
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The short answer
Divide 100 by the first N-P-K number to get the pounds of product that deliver 1 lb of nitrogen per 1,000 sq ft. A 30-0-4 bag: 100 ÷ 30 = 3.3 lbs per 1,000 sq ft. Most lawns want 0.5 to 1 lb of nitrogen per application and 2 to 4 lbs of nitrogen per year total.
Scotts Elite Broadcast Spreader
Twin rotors give an even 6-foot pattern, which is what makes half-rate perpendicular passes actually work.
Fertilizer bags list a spreader setting, but that number assumes a specific machine, a specific walking speed, and a full hopper. The rate you actually need is a calculation, and it takes ten seconds.
The one formula
Pounds of product per 1,000 sq ft = 100 ÷ the nitrogen percentage (the first N-P-K number). Multiply by your target nitrogen rate if it is not 1 lb.
| Analysis | Lbs per 1,000 sq ft | Lbs for 5,000 sq ft |
|---|---|---|
| 46-0-0 (urea) | 2.2 | 11 |
| 32-0-4 | 3.1 | 15.5 |
| 24-0-6 | 4.2 | 21 |
| 16-4-8 | 6.3 | 31.5 |
| 10-10-10 | 10 | 50 |
How much nitrogen per year
- Tall fescue and bluegrass: 2 to 4 lbs N per 1,000 sq ft per year, weighted toward fall.
- Bermuda and zoysia: 3 to 5 lbs N per year, applied through the summer growing season.
- Never exceed 1 lb of quick-release N in a single application — split larger totals across four to six weeks.
- Slow-release products can go slightly higher per application because they meter out over weeks.
Getting the spreader to match the math
- 1Weigh out the exact amount needed for a measured test area — 1,000 sq ft is easiest.
- 2Set the spreader one notch below the bag recommendation and load only that weighed amount.
- 3Walk the area in one direction at a steady pace with the hopper open only while moving.
- 4If product remains, open the setting slightly; if you ran out early, close it.
- 5For even coverage, apply half the rate in one direction and half perpendicular to it.
Myth
More fertilizer means a greener lawn faster.
The Fact
Past about 1 lb of quick-release nitrogen, extra product burns leaf tissue, pushes weak top growth, and runs off into storm drains. Split rates produce deeper color for longer with less risk.
Frequently Asked Questions
- How do I calculate fertilizer per 1,000 sq ft?
- Divide 100 by the first number on the bag. A 30-0-4 fertilizer needs 3.3 lbs of product per 1,000 sq ft to supply 1 lb of nitrogen.
- How many bags do I need for my lawn?
- Multiply your rate per 1,000 sq ft by your turf area in thousands, then divide by the bag weight. A 5,000 sq ft lawn at 3.3 lbs needs 16.5 lbs — about one 16 lb bag.
- Should I water after fertilizing?
- Water granular fertilizer in with about 1/4 inch immediately unless the label says otherwise. It moves prills off the blades and starts the release, which is also how you avoid burn.
The Gear We’d Buy
Everything referenced in this guide, in one place.
Scotts Elite Broadcast Spreader
Top pickTwin rotors give an even 6-foot pattern, which is what makes half-rate perpendicular passes actually work.
Typically $100 – $140
Digital Hanging Scale
Weigh out the exact test amount — calibration is guesswork without it.
Typically $12 – $20
Milorganite Slow-Release Fertilizer
Low-burn slow release, which is the forgiving choice while you dial in your spreader setting.
Typically $18 – $30
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Key Takeaways
- 100 ÷ the N number = pounds of product per 1,000 sq ft.
- Cap quick-release nitrogen at 1 lb per application.
- Measure actual turf area, not lot size.
- Split the rate in two perpendicular passes for even color.
Reviewed by
The Lawn Tool Hub Test Bench
We buy, borrow and break lawn tools on our own yards — clay in the back, sand-cut Bermuda in the front — and write down what actually changed the result.
Keep reading
How to Calibrate a Broadcast Spreader
Set the right spreader number for any fertilizer using a catch test and simple math — plus the walking speed that makes the setting mean anything.
A Lawn Fertilizer Schedule That Actually Works (By Grass Type)
Cool-season lawns: feed in fall, fall, and fall. Warm-season: late spring through summer. Exact timing, rates, and the mistakes that burn grass.
The Best Time to Fertilize Your Lawn (Season, Weather, Time of Day)
Fertilize when grass is actively growing, before light rain, in the early morning. The wrong week wastes the whole bag — here's the right one.
Top pick
Scotts Elite Broadcast Spreader