0-0-50 Fertilizer
PotassiumAlso known as: Sulfate of potash (SOP)
0-0-50 is 0% nitrogen, 0% phosphate and 50% potash by weight. To apply 1 lb of potash per 1,000 sq ft, spread 2 lbs of product per 1,000 sq ft; a 50-lb bag covers about 25,000 sq ft at that rate.
What 0-0-50 Means
Nitrogen (N)
0%
0 lb per bag
Green color and growth
Phosphate (P₂O₅)
0%
0 lb per bag
Root growth, new seedlings
Potash (K₂O)
50%
25 lb per bag
Stress, drought and cold tolerance
Pounds shown are per 50-lb bag. The N:P:K ratio simplifies to 0:0:1. The remainder of the bag is carrier, filler, and secondary nutrients.
How Much 0-0-50 to Apply
Lawn feeding is measured in pounds of nutrient per 1,000 sq ft. Here's how much product hits each common target.
| Target | Product / 1,000 sq ft | Per acre | 50-lb bag covers | Delivers (N-P-K lb) |
|---|---|---|---|---|
| 0.5 lb K₂O | 1 lb | 43.6 lb | 50,000 sq ft | 0-0-0.5 |
| 1 lb K₂O | 2 lb | 87.1 lb | 25,000 sq ft | 0-0-1 |
What It's For
Sulfate of potash adds potassium plus sulfur with a much lower burn risk than muriate of potash. The usual choice for correcting low potassium on turf.
When to Use It
Spring or fall, split into light applications. Fall potassium supports winter hardiness.
Before You Spread It
- Still a salt. Stay around 1 lb K₂O per 1,000 sq ft per application and water it in.
- Phosphorus and potassium needs vary a lot from lawn to lawn. A soil test tells you whether you need them at all.
0-0-50 Calculator
Enter your lawn size to get the total amount, or change the analysis to check a different bag.
Spread 2 lb per 1,000 sq ft, 10 lb for 5,000 sq ft (0.2 bags).
Delivers 0 lb N, 0 lb P₂O₅ and 1 lb K₂O per 1,000 sq ft. Never exceed the label rate.
Common Questions
How much 0-0-50 per 1,000 sq ft?
To deliver 1 lb of potash per 1,000 sq ft, apply 2 lbs of 0-0-50 per 1,000 sq ft, or about 87.1 lbs per acre. Many applications use half that or less, and the product label rate always comes first.
What is 0-0-50 fertilizer used for?
Sulfate of potash adds potassium plus sulfur with a much lower burn risk than muriate of potash. The usual choice for correcting low potassium on turf.
When should I apply 0-0-50?
Spring or fall, split into light applications. Fall potassium supports winter hardiness.
What do the numbers 0-0-50 mean?
They're the percentages by weight of nitrogen (N), phosphate (P₂O₅) and potash (K₂O). A 50-lb bag of 0-0-50 contains 0 lbs of nitrogen, 0 lbs of phosphate and 25 lbs of potash; the rest is carrier and other ingredients.
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