How to Apply Lawn Fertilizer: Complete Guide for Healthy Grass

Proper fertilization is essential for maintaining a healthy, green lawn. Learn when and how to apply fertilizer for optimal grass growth and health.

1-2 hours
beginner
spring

Tools You'll Need

  • Broadcast spreader or drop spreader
  • Lawn mower
  • Garden hose or sprinkler
  • Work gloves
  • Safety glasses

Materials

  • Lawn fertilizer (appropriate for your grass type)
  • Water

Step-by-Step Instructions

1

Choose the Right Fertilizer

Select fertilizer based on your grass type, soil conditions, and the season. Look for balanced NPK ratios and consider slow-release formulas.

Pro Tips

  • Test your soil first to determine needs
  • Choose fertilizer appropriate for your grass type
2

Prepare Your Lawn

Mow your lawn 1-2 days before fertilizing and remove clippings. Ensure the grass is dry and the soil is moist but not wet.

Pro Tips

  • Don't fertilize wet grass
  • Water lawn 1-2 days before if soil is dry
3

Calibrate Your Spreader

Set your spreader to the recommended application rate for your fertilizer. Test on a small area first to ensure proper coverage.

Pro Tips

  • Follow package instructions for spreader settings
  • Over-application can burn your lawn
4

Apply Fertilizer Evenly

Apply fertilizer in a systematic pattern, overlapping slightly to ensure even coverage. Start around the perimeter and work inward.

Pro Tips

  • Apply half the fertilizer in one direction, half perpendicular
  • Avoid overlapping too much
5

Water and Monitor

Water the lawn lightly after application to activate the fertilizer. Monitor for signs of over-fertilization and adjust future applications.

Pro Tips

  • Water within 24 hours of application
  • Don't overwater - just enough to dissolve fertilizer

Frequently Asked Questions

How often should I fertilize my lawn?

Most lawns need 2-4 applications per year: early spring, late spring, early fall, and late fall for cool-season grasses.

What's the best time to fertilize?

Early spring (March-April) and early fall (September) are the most important times for cool-season grasses.

Can I over-fertilize my lawn?

Yes, over-fertilization can burn grass, promote disease, and cause excessive growth. Always follow package instructions.

Should I fertilize a new lawn?

Wait 6-8 weeks after seeding or sodding before applying fertilizer to allow the grass to establish properly.

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