How to fertilize a lawn?

Proper fertilization is foundational to lawn health and appearance. Nitrogen, phosphorus, and potassium—represented by the three numbers on fertilizer bags—each serve critical functions. Charlotte's growing season and seasonal temperature changes determine optimal application timing.

Understanding Fertilizer Numbers

A fertilizer labeled 10-10-10 contains 10% nitrogen (N), 10% phosphorus (P), and 10% potassium (K). Nitrogen promotes leafy green growth, phosphorus supports root development, and potassium enhances overall plant vigor and disease resistance. For mature lawns, a ratio like 15-5-10 emphasizes leaf growth.

Seasonal Application Schedule for Charlotte

• Early Spring (March): Apply balanced fertilizer as grass breaks dormancy
• Late Spring (May): Use lighter application to reduce disease risk in summer heat
• Early Fall (August-September): Switch to higher potassium ratio (like 5-10-15) to strengthen plants before winter
• Late Fall (November): Apply slow-release nitrogen for early spring green-up

Application Methods

Granular spreaders (both rotary and drop types) are most common and effective. Liquid fertilizers allow quick nutrient uptake. Organic options like compost and slow-release products provide steady nutrition. Always calibrate spreaders properly and apply on dry grass to prevent burn.