Best Soil Fertilizer For Grass: Compare 10 Options

#1 · Best Overall

1. Jonathan Green Mag-I-Cal Plus

• Form: Powder

Best for: Acidic or compacted lawn soils.

Why it ranks #1: Targets two grass-growing problems directly: it raises soil pH and helps loosen hard, compacted soils to improve root penetration and nutrient release.

Soil pH adjustment is the core purpose of Jonathan Green Mag-I-Cal Plus: it raises pH in acidic lawn soil, where grass may turn light green and fertilizer nutrients may not be fully absorbed. Its additional role in loosening hard, compacted soil gives it a targeted fit beyond routine nutrient feeding.

The product addresses two soil barriers at once: it rapidly raises soil pH and helps break up clay and compacted ground. That can support better root penetration, while increased biological activity helps release nutrients trapped in soil. It is intended for lawn soils below the stated pH range of 6.2 to 7.0, where acidity can interfere with nutrient uptake. The powder form distinguishes it from a liquid soil treatment, but the supplied information does not specify an application rate here.

Skip it if you need season-long nitrogen feeding; Pennington Full Season Lawn Fertilizer releases nitrogen for up to four months.

A focused option for lawns with acidic or hard soil, particularly when poor nutrient uptake or restricted root penetration is the concern. It is a soil-correction choice, not a substitute for a regular fertilizer feeding plan.

Listed on Amazon as: Jonathan Green Mag-I-Cal Plus – Lawns in Acidic & Hard Soil – 5,000 Sq Ft

#2 · Best pH Amendment

2. Jonathan Green Mag-I-Cal

• Form: Granules
• Weight: 54 lb

Best for: Large lawns with acidic soil.

Why it ranks #2: A lawn-specific soil food for acidic soil, it raises pH and is described as having the pH-adjusting power of up to 15 bags of limestone.

The stated pH-adjusting power of up to 15 bags of limestone per bag makes Jonathan Green Mag-I-Cal a concentrated choice for acidic lawns. Its soluble calcium carbonate is immediately available, enabling a soil-correction approach for large areas where low pH can hinder grass color and nutrient uptake.

Mag-I-Cal is intended to raise soil pH toward the stated lawn range of 6.2 to 7.0, addressing conditions associated with light-green grass, persistent weeds, and incomplete fertilizer nutrient absorption. Its soluble calcium carbonate provides pH-adjusting power, and the product is described as a limestone alternative. The 15,000-square-foot title coverage suits a broad lawn-care pass. Directions specify an application rate of 3.5 pounds per 1,000 square feet, so spreading requires attention to area and measurement.

Skip it if your soil needs help loosening compaction as well as raising pH; Jonathan Green Mag-I-Cal Plus also targets hard and compacted soils.

This suits owners of larger lawns whose main issue is acidic soil and who want a limestone alternative with substantial stated coverage. Measure the area carefully and apply at the listed rate; it is focused on pH adjustment.

Listed on Amazon as: Jonathan Green Mag-I-Cal Soil Food for Lawns in Acidic Soil – 15,000 Sq Ft

#3 · Longest Feeding

3. Pennington Full Season Lawn Fertilizer

• Form: Granules
• Weight: 11.2 lb

Best for: One-application seasonal lawn feeding.

Why it ranks #3: Combines lawn fertilizer with beneficial microorganisms and controlled-release nitrogen that feeds for up to four months in one seasonal application.

Polymer-coated urea releases nitrogen gradually for up to four months, enabling Pennington Full Season Lawn Fertilizer to cover a season with one application. Added iron supports deep greening, while beneficial microorganisms are included to revitalize soil—useful features for homeowners seeking fewer fertilizer passes.

The controlled-release nitrogen reduces the need for repeat feeding during its stated four-month window, while the 5% iron is included for deep green color. Natural beneficial microorganisms add a soil-care element alongside the 32-0-5 fertilizer formula. Apply with a spreader according to package directions; the product is listed for Kentucky bluegrass, tall fescue, Bermudagrass, Zoysiagrass, and more. Coverage depends on bag size, with options listed for up to 4,000 or 12,000 square feet.

Skip it if you live in Hawaii or South Dakota; Scotts Turf Builder Lawn Food is listed for use on any grass type without that geographic restriction.

A good fit for homeowners who prefer a single seasonal spreader application and want both slow-release nitrogen and added iron. Check the product’s stated geographic restriction and select the coverage size appropriate to your lawn.

Listed on Amazon as: Pennington Full Season Lawn Fertilizer 4M 32-0-5 RF 3/11.2Lb

#4 · Best Organic Formula

4. Down to Earth Bio-Turf

• Form: Granules
• Weight: 4 lb

Best for: Organic granular lawn and garden food.

Why it ranks #4: Its OMRI-listed 8-3-5 granular formula is designed for lawns, with natural ingredients intended to support deep roots and reduce watering needs.

OMRI listing for organic production distinguishes Down to Earth Bio-Turf for buyers choosing a natural granular fertilizer. Its 8-3-5 formula is aimed at lawns, landscapes, and ornamentals, with deep-root development intended to help reduce watering requirements and potassium to help manage seasonal stress.

The nitrogen-rich formula supports early-season growth, while extra potassium is described as helping reduce stress from temperature changes and drought. Granules work with lawn spreaders, giving homeowners a familiar application method across grass and landscape plantings. The product is also identified as suitable for heavy-feeding garden vegetables, extending its use beyond the lawn. Its deep-root focus is tied to reducing watering requirements, though it remains a fertilizer application rather than a substitute for watering when plants need it.

Skip it if you need coverage for a large lawn in a single purchase; The Andersons Core 24-6-12 lists coverage up to 6,200 square feet.

A fit for organic-production-minded gardeners who want one granular product for lawn and some garden uses. Its 4-pound box is better suited to smaller or targeted applications than broad-area feeding.

Listed on Amazon as: Down to Earth All Natural Fertilizers Organic Bio-Turf Lawn Food for Grass, Landscape and Ornamentals – Works with Lawn Spreaders 8-3-5, 4 lb

#5 · Best Liquid Amendment

5. Farmer's Secret Soil Revitalizer

• Form: Liquid
• Weight: 12.8 oz

Best for: Liquid soil amendment for monthly use.

Why it ranks #5: This concentrated liquid uses activated humics to support soil microbial activity and nutrient availability; directions call for dilution at one ounce per gallon.

Activated humics are the defining feature of Farmer’s Secret Soil Revitalizer, enabling a soil-first approach that stimulates microbial activity rather than simply feeding grass blades. The concentrated liquid can be diluted and sprayed, making it a fit for lawn keepers who want to incorporate soil care into regular growing-season maintenance.

The formula uses activated humics derived from organic sources and is OMRI listed, supporting buyers seeking an organic soil amendment without synthetic chemicals. Dilute one ounce in one gallon of water, then spray; the monthly recommendation through the growing season, especially fall and spring, creates a recurring task. Its stated aim is increased microbial activity and nutrient availability in soil, so it is not presented as a conventional granular lawn-feed schedule.

Skip it if you want a granular feed for a spreader; Down to Earth Bio-Turf is a granular lawn fertilizer that works with lawn spreaders.

Choose this for a soil-focused routine when you are comfortable measuring, diluting, and spraying a liquid monthly. It is an amendment aimed at soil activity and nutrient availability, not a one-application seasonal grass-feeding option.

Listed on Amazon as: Farmer’s Secret Soil Revitalizer – Organic (OMRI Listed) Dirt Health Booster – Liquid Compost Soil Amendment – Activated Humic Acid – Great for Fall/Spring Application (32oz)

#6

6. O.M. Scott & Sons Natural Grass Food

• Weight: 12.7 lb

Best for: Natural lawn feeding with longer coverage.

Why it ranks #6: Grass-specific natural lawn food begins feeding after watering and continues for up to 10 weeks, with directions recommending repeat feeding every 8 to 10 weeks.

Feeding for up to 10 weeks gives O.M. Scott & Sons Natural Grass Food a longer interval between applications than a short-cycle lawn feed. Its natural nutrient sources suit homeowners who want to strengthen grass from the roots up, while the listed kid- and pet-use messaging addresses active yards.

The food begins feeding immediately when watered right after application, then continues for up to 10 weeks, making its schedule clear for seasonal lawn maintenance. Apply it with a Scotts spreader using the setting on the bag, then finish with light watering. The directions call for feeding every 8 to 10 weeks, up to four times a year. The product contains no added artificial ingredients or pesticides, according to the supplied facts.

Skip it if you want a product that needs no immediate post-application watering; Scotts Turf Builder WinterGuard can be applied to wet or dry lawns.

This fits homeowners seeking natural-source lawn food and a repeatable feeding schedule for a yard used by children or pets. Plan to water immediately after spreading to start feeding, and follow the stated 8-to-10-week interval.

Listed on Amazon as: O.M. Scott & Sons Natural Grass Food, 12.72 lbs.

#7

7. The Andersons Core Fertilizer

• Form: Granules

Best for: Extended feeding with fine granules.

Why it ranks #7: The 24-6-12 formula includes iron and micronutrients, while quick- and slow-release nitrogen offers immediate nutrition and feeding for up to six weeks.

Super-fine particles provide twice the number of particles per square foot, helping The Andersons Core 24-6-12 spread evenly across turf. Quick- and slow-release nitrogen combine immediate nutrition with feeding for up to six weeks, while iron and micronutrients support fuller lawn nutrition and greening.

The 24-6-12 formula supplies a 4:1:2 ratio, and the product is stated to suit all turf types and spring, summer, or fall use. Fine particles support even distribution, while the combination of quick- and slow-release nitrogen balances near-term feeding with a six-week extended period. The 18-pound bag covers up to 6,200 square feet. For better application, clear lawn debris and avoid applying before heavy rainfall, which can wash particles away.

Skip it if you want up to four months from one application; Pennington Full Season Lawn Fertilizer releases nitrogen for up to four months.

This suits lawn owners seeking professional-grade, fine-particle coverage across turf types and seasons, with both quick nutrition and a six-week feed. Clear debris and avoid heavy rain around application to help particles reach the soil.

Listed on Amazon as: The Andersons Core 24-6-12 Professional-Grade All-Purpose Lawn Fertilizer – 18 lbs. Covers up to 6,200 sq. ft.

#8

8. Scotts Turf Builder Lawn Food

• Form: Powder
• Weight: 12.5 lb

Best for: Any-grass feeding across seasons.

Why it ranks #8: A broad grass-feeding option for any grass type, it supports deep roots and can be applied to wet or dry lawns in spring, summer, or fall.

Use on any grass type and apply in spring, summer, or fall: Scotts Turf Builder Lawn Food offers a broad timing and grass-type fit. Its pesticide-free formula feeds and strengthens grass while building deep roots that improve the lawn’s ability to absorb water and nutrients.

The root-building focus connects feeding with stronger absorption of water and nutrients, while the product is described as helping protect grass against future problems. Its application window spans spring, summer, and fall, and it can be applied to a wet or dry lawn. That flexibility supports homeowners who want a general lawn food rather than a fall-only treatment. The supplied facts specify no extended feeding duration, so buyers should not treat it as a season-long, single-application formula.

Skip it if you want a stated four-month nitrogen release from one application; Pennington Full Season Lawn Fertilizer provides controlled-release nitrogen for up to four months.

Choose this for general feeding across grass types when flexible application timing and root support matter. It works across three seasons, but buyers seeking a defined extended-release schedule should select a product with a stated feeding duration.

Listed on Amazon as: Scotts Turf Builder Lawn Food, 12.5 lbs.

#9

9. Scotts Turf Builder WinterGuard

• Form: Granules
• Weight: 8 oz

Best for: Fall recovery and root-building.

Why it ranks #9: This fall lawn food is designed to help grass recover from summer stress and build deeper roots ahead of winter, but its timing is seasonal.

Fall application helps this fertilizer build strong, deep grass roots, giving lawns a seasonal reset after summer heat, drought, and regular activity. Scotts Turf Builder WinterGuard is made for any grass type, so it suits yards needing fall feeding and winter preparation without a grass-specific selection.

Its fall timing links summer recovery with preparation for harsh winter conditions: the product supplies nutrients to help grass recover from heat, drought, and activity while building roots for next spring. Application is flexible, since it can go onto a wet or dry lawn. Scotts spreader settings are provided—2 3/4 for broadcast or rotary models and 6 for drop spreaders—while lightly watering in is optional for fast results.

Skip it if you need a feeding plan outside fall; Scotts Turf Builder Lawn Food can be applied in spring, summer, or fall.

A practical pick for homeowners planning a fall lawn-care pass after summer stress, especially where root development and winter preparation matter. Its seasonal focus is the boundary: choose a different Scotts food for spring or summer applications.

Listed on Amazon as: Scotts Turf Builder WinterGuard Fall Lawn Food, 10 lbs.

#10

10. The Andersons PGF Balanced

• Form: Granules
• Weight: 18 lb

Best for: Balanced feeding for spring and fall.

Why it ranks #10: Its 10-10-10 formula supplies immediate nutrition and micronutrients, but the product also targets gardens and flower beds rather than grass alone.

All quick-release nitrogen gives The Andersons PGF Balanced immediate nutrition, while its extremely fine particles support more coverage and even distribution. The 10-10-10 formula also includes micronutrients and 2% iron, making it a balanced option for lawns, gardens, and flower beds during the growing season.

The balanced 10-10-10 formula is especially suited to spring and fall lawn applications, when the supplied description notes that high nitrogen levels are less desirable. Fine particles help distribute the fertilizer evenly; apply with a spreader and water to activate nutrients. Micronutrients and 2% iron are included for extra-deep greening. It can also be mixed into garden soil while turning or tilling at the beginning of the growing season, extending its use beyond turf.

Skip it if you live in California; The Andersons Core 24-6-12 is another professional-grade lawn fertilizer in this roundup.

A useful fit for buyers seeking balanced spring or fall feeding and a fine-particle spread across lawns, gardens, or flower beds. It relies on quick-release nitrogen, so it does not offer the extended feeding period of slow-release formulas.

Listed on Amazon as: The Andersons PGF Balanced 10-10-10 Fertilizer with Micronutrients and 2% Iron (5,000 sq ft)