Question 1

What do NPK numbers mean on fertilizer bags?

Accepted Answer

NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K). The numbers represent the percentage of each nutrient by weight. For example, 10-10-10 means 10% nitrogen, 10% phosphorus, and 10% potassium.

Question 2

How often should I fertilize my lawn?

Accepted Answer

Frequency depends on your grass type and season. Cool-season grasses typically need 3-4 applications per year (spring and fall), while warm-season grasses may need 4-5 applications during their growing season (spring through fall).

Question 3

When is the best time to fertilize?

Accepted Answer

For cool-season grasses, apply in early spring and fall. For warm-season grasses, apply in late spring through early fall. Avoid fertilizing during extreme heat or drought conditions.

Question 4

Can I over-fertilize my lawn?

Accepted Answer

Yes, too much fertilizer can burn your lawn and cause environmental problems. Stick to the recommended amounts and avoid applying before heavy rain or on wet grass.

Question 5

How do I choose between different NPK ratios?

Accepted Answer

Choose based on your lawn's needs: High nitrogen (first number) for green color and growth, high phosphorus (middle number) for root development and new lawns, high potassium (last number) for stress resistance and winter hardiness.

How much fertilizer does your lawn need?