Seed and Sod Application Rates

Quick Tips

  • Milorganite should be mixed 2-4 inches into root zone
  • Mixing grass seed with Milorganite is an effective way to spread seed
  • Keep seeded area moist until the seeds emerge, until 1/2-1 inch tall
Milorganite’s nitrogen and phosphorous speeds up lawn development, and the fertilizer’s iron helps generate a deep, lasting green.  Milorganite should be mixed into the top 2-4 inches of soil, where its slow-release nitrogen can stay in the soil profile in the perfect position to feed young roots. 

Follow this chart for seeding, sodding and sprigging:

Rate Chart for Using Milorganite to Seed, Sod or Sprig
Milorganite (lbs per 1,000 sq ft)

Soil Type Seeding & Sodding Sprigging
Sand 50-100 lbs* 50-100 lbs*
Native soil 25-50 lbs* 25-50 lbs*
*Use the higher rates for grass types that are high nitrogen users, such as Kentucky bluegrass or Bermuda grass, and also in soils with low organic matter that have very infertile root zones.

Mixing Seed and Milorganite

Mixing grass seed with Milorganite is an effective way to spread seed accurately. Mix 4 parts Milorganite with 1 part seed by weight.  If you choose to mix Milorganite and seed, be careful to decrease future applications of Milorganite to prevent over-fertilization.


Milorganite Seed Mixing Chart

Seed Type Milorganite (lbs) Seed (lbs) Seed per 1,000 sq ft
Area Covered (sq ft)
Milorganite per 1,000 sq ft
Bentgrass 20 5 1 lb 5,000
4 lbs
20 5 1 lb 5,000
4 lbs
Blue Grass 100 25 4 lbs 6,250
16 lbs
Blue-Rye Mix 100 25 6 lbs 4,250
23 lbs
Rye Grass 100 25 8 lbs 3,250
30 lbs



Spread seed or Milorganite and seed mix evenly on the prepared soil.  Gently work the seed into the soil 1/16 to 1/8 of an inch. Light (sandy) soils may only require watering for seed incorporation.


Keep the seeded area moist until the seeds emerge.  The seedlings need frequent gentle watering until ½ to 1 inch tall.  When climatic conditions allow, reduce watering to several time a week at a depth of 1 to 2 inches.  Decrease frequency and increase depth of watering as seedlings mature.

For more advice, check out our Watering and Mowing pages.