Garden
Fertilizer Calculator
How much fertilizer? Plug in your NPK rating, lawn size, and target lb of N per 1,000 sq ft — get the right application amount.
FAQ
What's NPK? +
The three numbers on the bag = % of Nitrogen, Phosphorus, Potassium. A 29-0-3 is 29% N, 0% P, 3% K. The rest is filler/carrier.
How often to fertilize lawns? +
Cool-season grasses: 3-4 times/yr, mostly fall. Warm-season: 4-6 times during the growing season. Never fertilize dormant grass.