Fertilizer Rates & Schedule

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Milorganite Fertilizer. For Better Results. Naturally.

Quick Tips

  • Use one 36 lb. bag of Milorganite per 2,500 sq. ft. of lawn
  • Fertilize 4 times per year
  • If you’re only going to fertilizer once a year, fall is the best time

When to Fertilize the Lawn

To remember when to fertilize in the north and south we recommend using the “holiday schedule.” The specific holidays when you fertilize will depend on whether you have northern (cool) season grass or southern (warm) season grass.

Check out the tables below for recommendations on when to fertilize with Milorganite and how much to use based on your type of grass.

If you’re overseeding your lawn, mix the grass seed with Milorganite. It’s an effective way to spread seed and fertilize at the same time. Mix 4 parts Milorganite with 1 part seed by weight according to recommended overseeding application rates.

Cool-Season Grasses - Northern

Cool-Season Grasses such as Kentucky Bluegrass, Fescue, and Perennial Ryegrass should be fertilized four (4) times per year.

For the last application, fertilize with Milorganite as late in the season as possible—just before the first deep freeze or snowfall. This fertilizer application, known as a “dormant feeding,” encourages healthier, greener lawn in spring.

Holiday Application Metric rates
Memorial Day, end of May  36 lbs. per 2,500 ft2 16.3 kg per 200m2
July 4th, Canada Day 36 lbs. per 2,500 ft2 16.3 kg per 200m2
Labor Day, early September  36 lbs. per 2,500 ft2 16.3 kg per 200m2
Thanksgiving, mid November  36 lbs. per 2,500 ft2 16.3 kg per 200m2

Warm-Season Grasses - Southern

Warm-Season Grasses, such as Bermuda, St. Augustine, Centipedegrass, Bahia, and Zoysia, should be fertilized four (4) times per year.  Centipedegrass and Bahia grass prefer spring and summer feedings. Avoid fertilizing these varieties of grasses in the fall to help prevent winter kill.

Don’t fertilize warm-season grasses too late in fall. The grass is trying to go dormant and if you fertilizer you’re encouraging it to grow.  This may cause your lawn to be less hardy as it enters cold weather and more susceptible to winter injury. The last time to fertilize in fall is one month before dormancy or the average first killing frost.

Holiday Season Application
Easter (after turf breaks dormancy) 36 lbs. per 2,500 ft2
Memorial Day 36 lbs. per 2,500 ft2
Labor Day 36 lbs. per 2,500 ft2
Early October (overseeding)* 36 lbs. per 2,500 ft2
*In regions where killing frosts can be expected, avoid fertilizing warm-season grasses in the fall less than one month prior to the average date of the first killing frost.  For best results, fertilize when over-seeding.

New Lawns

Mix Milorganite into the top two inches of soil before seeding or sodding.  After you mow the lawn for the third time, apply one 36 lb. bag per 2,500 sq. ft. of lawn, then follow the recommended fertilizing schedule for your grass type. (See above.)

Seed or Sod Application  Metric Rates
Seeding 72 lbs. per 2,500 ft2 32.6 kg per 200m2
72 lbs. per 2,500 ft2 32.6 kg per 200m2

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