By Emily ParkerUpdated November 2026
Looking for a milorganite organic lawn fertilizer that feeds your grass without harming the bees and other pollinators in your yard? Milorganite is a biosolids-based, slow-release fertilizer, and it is one of the most widely recognized organic options for lawns. Choosing the right package size, nutrient ratio and product form still matters, though, especially if you are also trying to keep a bee-friendly yard. This guide compares five Milorganite-related products on fit for common lawn needs, package size, nutrient profile and owner feedback patterns. The selection criteria were research-based: product specifications, brand reputation and the kinds of experiences owners commonly report. We did not test these products ourselves.
Our top picks at a glance
- 1
TOP CHOICEBest overallEasyGo Product Milorganite 32 lbs. Slow-Release Nitrogen FertilizerView on Amazon - 2
TOP CHOICEBest for deep greeningMilorganiteIron for deep greening, for lawns, flowers and gardens, feeView on Amazon - 3
TOP CHOICEBest for Southern lawnsGrass Fertilizer for Lawns with Southern Grasses, 5,000 sq. ft. ScottsView on Amazon - 4
Best balanced optionThe Andersons PGF Balanced 10-10-10 Fertilizer with Micronutrients andView on Amazon - 5
Best budget pickMilorganite Fertilizer 6-4-0View on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| EasyGo Product Milorganite 32 lbs. | General lawns, trees, shrubs and flowers | Slow-release nitrogen from a biosolids base |
| Milorganite Fertilizer 6-4-0 | Owners wanting a standard Milorganite formula | Organic 6-4-0 analysis |
| MilorganiteIron 32 lb (Pack of 4) | Deep green color and multi-season supply | Added iron with a 6-4-0 base, feeding for up to 8–10 weeks per application |
| ScottsGrass Southern Lawn Food | Southern grass lawns | Formulated for warm-season grasses |
| The Andersons PGF Balanced 10-10-10 | Lawns needing a balanced nutrient boost | 10-10-10 analysis with micronutrients and 2% iron |
EasyGo Product Milorganite 32 lbs. Slow-Release Nitrogen Fertilizer
EasyGo Product Milorganite 32 lbs. Slow-Release Nitrogen Fertilizer. Good for Promoting Healthy Growth of lawns, Trees, shrubs and Flowers.
Best for: General-purpose feeding of lawns, plus trees, shrubs and flowers from one bag
This is a good fit for homeowners who want one slow-release product for the whole landscape rather than separate formulas for turf and beds. The listing describes it as a nitrogen fertilizer that promotes healthy growth across lawns, trees, shrubs and flowers.
Key specs
- Package size: 32 lbs.
- Type: slow-release nitrogen fertilizer
- Intended use: lawns, trees, shrubs and flowers
Pros
- Slow release reduces the risk of rapid growth spurts and nitrogen runoff compared with quick-release products
- Single bag covers multiple planting types
- Fits a wide range of residential yards
Cons
- Not formulated specifically for one grass type, so results depend on your turf and soil
- Owners sometimes note a distinct odor after application, which is typical of biosolids-based products
Bottom line: A practical choice for homeowners who want one slow-release bag for lawn and ornamentals.
Milorganite Fertilizer 6-4-0
Milorganite Fertilizer 6-4 – 0
Best for: Budget-minded owners who want the standard Milorganite analysis
This listing reflects the core Milorganite formula with a 6-4-0 nutrient analysis. It suits people who already know Milorganite works for their lawn and want a straightforward, no-frills option.
Key specs
- Nutrient analysis: 6-4-0 (nitrogen-phosphorus-potassium)
- Organic, biosolids-based formulation
Pros
- Familiar, widely used formula
- Organic analysis suited to bee-conscious lawn care
- Simple product with no added extras to sort through
Cons
- Nutrient analysis is modest, so heavy-feeding lawns may need more frequent applications
- Does not add iron, so color boost is limited compared with the iron-enriched version
Bottom line: A sensible pick for owners who want the classic Milorganite formula without extra additives.
MilorganiteIron for deep greening, for lawns, flowers and gardens, feeds up to 8-10 weeks 6-4-0 Slow-Release Fertilizer, 32 lb (Pack of 4)
MilorganiteIron for deep greening, for lawns, flowers and gardens, feeds up to 8-10 weeks 6-4-0 Slow-Release Fertilizer, 32 lb (Pack of 4)
Best for: Deep green color and a full season of feeding across several bags
This multi-bag pack adds iron to the 6-4-0 base. It suits owners who want a darker, more uniform color and a larger supply for a whole growing season, especially on lawns, flower beds and gardens.
Key specs
- Package: 4 bags, 32 lb each
- Nutrient analysis: 6-4-0 with added iron
- Listed feeding window: up to 8–10 weeks per application
Pros
- Iron supports a deeper green color without pushing excess top growth
- Pack format covers a full season for many yards
- Works across lawns, flower beds and gardens
Cons
- Higher total weight means storage space is needed
- Iron can stain driveways or patios if spilled and not swept up promptly
Bottom line: The best choice among these for owners who want deep color and a season-long supply.
ScottsGrass Fertilizer for Lawns with Southern Grasses, 5,000 sq. ft. Turf Builder Southern Lawn Food, 14.06 lbs.
Grass Fertilizer for Lawns with Southern Grasses, 5,000 sq. ft. Scotts Turf Builder Southern Lawn Food, 14.06 lbs.
Best for: Southern warm-season lawns such as Bermuda, Zoysia and St. Augustine
This is a synthetic-based turf formula rather than an organic one, so it is included here for comparison only. Owners with Southern grass lawns who are not strictly organic may consider it. If you are committed to an organic, bee-safe program, you will likely prefer the Milorganite options above.
Key specs
- Coverage: approximately 5,000 sq. ft.
- Package: 14.06 lbs.
- Designed for Southern grass types
Pros
- Formulated for warm-season grasses
- Large coverage area for the bag size
- Widely available and easy to apply with a spreader
Cons
- Not an organic product, so it does not fit a strictly organic lawn program
- Synthetic formulas can contribute to runoff if overapplied near water
Bottom line: Worth considering only if you have a Southern lawn and are not limiting yourself to organic inputs.
The Andersons PGF Balanced 10-10-10 Fertilizer with Micronutrients and 2% Iron (5,000 sq ft)
The Andersons PGF Balanced 10-10-10 Fertilizer with Micronutrients and 2% Iron (5,000 sq ft)
Best for: Lawns that need a balanced nutrient boost across nitrogen, phosphorus and potassium
This balanced 10-10-10 product adds micronutrients and iron to the mix. It is a good match for owners whose soil tests show general nutrient needs and who want an even feed rather than a nitrogen-heavy product.
Key specs
- Nutrient analysis: 10-10-10
- Contains micronutrients and 2% iron
- Coverage: approximately 5,000 sq ft
Pros
- Balanced analysis supports overall plant health
- Micronutrients address needs beyond the big three
- Iron content helps with color
Cons
- Higher phosphorus and potassium than many lawns need, so a soil test is advisable first
- Not positioned as an organic biosolids product, so check that it fits your program
Bottom line: A good pick for owners who have tested their soil and need a balanced, micronutrient-containing feed.
Buying Guide
Nutrient Analysis (N-P-K Ratio)
The three numbers on a fertilizer bag show the percentage of nitrogen, phosphorus and potassium by weight. A 6-4-0 product contains 6% nitrogen, 4% phosphorus and no potassium. For most established lawns, nitrogen is the nutrient that drives green growth. Check a soil test before adding phosphorus or potassium, since many soils already contain enough.
Good picks for this: Milorganite Fertilizer 6-4-0, EasyGo Product Milorganite 32 lbs.
Slow-Release vs. Quick-Release
Slow-release products break down over weeks, which supplies nitrogen steadily and lowers the risk of burn and runoff. Quick-release products act within days but can push fast, weak growth. Manufacturers of slow-release organic products generally describe feeding windows measured in weeks, so plan applications accordingly.
Good picks for this: MilorganiteIron 32 lb (Pack of 4), EasyGo Product Milorganite 32 lbs.
Iron and Color Enhancement
Iron can deepen grass color without the surge in growth that nitrogen causes. If your main goal is a darker lawn with less mowing, look for an iron-containing formula. Be aware that iron can stain hard surfaces if spilled.
Good picks for this: MilorganiteIron 32 lb (Pack of 4), The Andersons PGF Balanced 10-10-10
Package Size and Lawn Coverage
Measure your lawn in square feet and compare it to the coverage listed on the bag. Many large bags are rated for around 5,000 sq. ft. at a standard rate. Buying too little means extra trips, while buying too much can mean storage problems for bagged products. Multi-bag packs suit owners who need a full season’s supply.
Good picks for this: MilorganiteIron 32 lb (Pack of 4), ScottsGrass Southern Lawn Food
Grass Type and Climate
Cool-season grasses such as fescue and bluegrass and warm-season grasses such as Bermuda and Zoysia have different feeding needs and timing. A product formulated for Southern grasses may not match a northern lawn’s schedule. Check your grass type before buying.
Good picks for this: ScottsGrass Southern Lawn Food, EasyGo Product Milorganite 32 lbs.
Organic Status and Bee Safety
If your goal is a bee-friendly yard, confirm that the product is organic and avoid formulas that rely on broad-spectrum pesticide additives. Biosolids-based products like Milorganite are commonly used in organic programs, but always read the label. For broader context on how organic and conventional programs compare, see Organic vs Conventional Lawn Care (2026): Which Is Better for Bees?.
Good picks for this: Milorganite Fertilizer 6-4-0, EasyGo Product Milorganite 32 lbs.
Application Method and Timing
Most granular fertilizers are applied with a broadcast or drop spreader. Apply on dry grass, water in lightly if the label recommends it, and keep product off sidewalks. Timing depends on your climate and grass type. For a month-by-month plan, see Organic Lawn Care Schedule: A Month-by-Month Guide for Bee-Safe Yards.
Good picks for this: EasyGo Product Milorganite 32 lbs., The Andersons PGF Balanced 10-10-10
FAQ
Is Milorganite really organic?
Milorganite is made from heat-dried microbes from wastewater treatment, and it is widely used in organic lawn programs. Confirm the current product label and any certification details before relying on it for a specific organic standard.
Is Milorganite safe for bees and pollinators?
Milorganite is generally considered a lower-risk option for pollinator-friendly yards because it contains no synthetic pesticides. As with any product, apply it according to label directions and avoid drift onto flowering plants or water.
How often should I apply Milorganite?
Application frequency depends on the product, grass type and climate. Many slow-release products describe feeding windows of several weeks. Follow the label for rates and intervals, and adjust based on your lawn’s appearance and a soil test.
Can Milorganite burn my lawn?
Slow-release organic products carry a lower burn risk than quick-release synthetics, but over-application can still stress turf. Use a calibrated spreader and avoid stacking applications too close together.
Does Milorganite smell?
Biosolids-based fertilizers often have a noticeable odor, especially right after application and when wet. The smell typically fades within a day or two as the product is watered in.
Should I get a soil test before buying a fertilizer?
Yes. A soil test shows pH and nutrient levels so you can avoid buying phosphorus or potassium you do not need. Many university extension services offer testing; for lawn-specific guidance, check the resources listed below.
Conclusion
For most homeowners wanting a slow-release, organic feed for mixed landscapes, the EasyGo Product Milorganite 32 lbs. is the most versatile choice. If deep color and a full season’s supply matter most, the MilorganiteIron four-bag pack fits well. Owners on a tighter budget who want the standard formula can start with Milorganite Fertilizer 6-4-0. Southern lawn owners who are not limiting themselves to organic inputs may consider ScottsGrass, while those who have tested their soil and need balanced nutrition may prefer The Andersons PGF Balanced 10-10-10. Match the product to your soil test, grass type and coverage, and you will get the most from a milorganite organic lawn fertilizer program.
Sources
- Federal guidance on biosolids use and land application standards (epa.gov)
- University-backed lawn fertilization and soil testing guidance (extension.org)
- Information on soil health, nutrient management and pollinator habitat (usda.gov)
Related reading
- Velvet Green Organic Lawn Care: A Step-by-Step Guide for Bee-Friendly Yards
- Top 6 Organic Lawn Care Crabgrass Products Worth Considering in 2026
- The Green Dude Organic Lawn Care: A Step-by-Step Guide for Bee-Safe Yards
About Emily Parker
Emily Parker is part of our editorial team and reviews and edits our pollinator-safe lawn care guides, checking product details against manufacturer specifications and owner feedback.
