Best 10 Corn Fertilizers for a Bountiful Harvest in 2025

Struggling to grow tall, healthy corn with impressive yields? The secret lies in choosing the best 10 corn fertilizers to nourish your crop and unlock its full potential. Corn is a nutrient-hungry plant, and poor soil or improper fertilization can lead to stunted growth, small ears, and disappointing harvests. This guide reviews the top 10 corn fertilizers available on Amazon in 2025, offering in-depth comparisons, pros, cons, and real customer insights to help you make an informed decision. Our recommendations are backed by extensive research, including Amazon reviews, expert gardening advice from sources like The Gardening Dad, and soil science principles. You’ll discover the best 10 corn fertilizers tailored to various needs—organic, liquid, granular, or budget-friendly—along with actionable tips to maximize your yield.

Why Corn Fertilizer Matters

Corn demands a steady supply of nutrients, particularly nitrogen, phosphorus, and potassium (NPK), to produce strong stalks, lush foliage, and large, flavorful ears. Nitrogen fuels leafy growth, phosphorus strengthens roots, and potassium boosts cob development and disease resistance. Soil testing is critical to identify deficiencies, as poor nutrient availability can stunt growth or reduce yields. Using the right fertilizer enhances plant vigor, improves resistance to pests and drought, and can increase yields by up to 20-30 bushels per acre, according to the Nebraska Corn Board. Fertilizer types—granular, liquid, organic, or synthetic—offer unique benefits: granular provides slow-release nutrition, liquid delivers quick uptake, organic improves soil health, and synthetic offers fast results. Choosing the right one depends on your soil, climate, and farming goals.

How We Chose the Best Corn Fertilizers

To identify the best 10 corn fertilizers, we evaluated products based on strict criteria:

• NPK Ratio: Prioritized high-nitrogen formulas (e.g., 10-10-10 or higher) tailored for corn’s needs.
• Customer Ratings: Selected products with 4+ stars and high review volume on Amazon.
• Price-to-Value: Balanced cost with coverage and effectiveness.
• Ease of Application: Considered user-friendliness for home gardeners and farmers.
• Organic vs. Synthetic: Included both to suit eco-conscious and conventional growers.
• Growth Stage Suitability: Ensured products work for seedling, vegetative, and reproductive stages.

Our research combined Amazon’s best-seller lists, customer feedback, and expert insights from sources like The Gardening Dad and Nebraska Corn Board. We focused on products with proven results, verified by user reviews and manufacturer claims, ensuring they address common corn-growing challenges like nutrient deficiencies and poor soil quality.

Top 10 Corn Fertilizers: Detailed Reviews and Comparison

Product Comparison Table

1. LEAVES AND SOUL Professional Liquid Corn Fertilizer (5-1-5)

• Compelling Description: LEAVES AND SOUL Professional Liquid Corn Fertilizer is a premium choice for gardeners seeking vibrant, healthy corn with minimal effort. Its 5-1-5 NPK ratio delivers a balanced nutrient blend, with moderate nitrogen to promote lush foliage, and sufficient phosphorus and potassium to support strong roots and cob development. This concentrated liquid formula is designed for rapid absorption, ensuring nutrients reach your corn plants quickly, whether applied as a soil drench or foliar spray. Crafted with high-quality, non-toxic ingredients, it’s safe for home gardens and versatile enough for all corn growth stages, from seedlings to tasseling. Users report corn stalks reaching up to 6 feet with robust ears, making it a top pick for small to medium gardens aiming for a bountiful harvest.

Buy It From Amazon

• Price: $15.49
• Key Features and Benefits:
  • Fast-acting liquid formula for immediate nutrient uptake.
  • Balanced 5-1-5 NPK ratio supports foliage, roots, and cobs.
  • Easy to dilute and apply via watering can or sprayer.
  • Made in the USA with a money-back guarantee.
  • Enhances produce quality, flavor, and yield.
• Pros:
  • Simple to mix and apply, ideal for beginners.
  • Promotes rapid growth and vibrant foliage.
  • Versatile for soil or foliar application.
• Cons:
  • Small bottle size may not suffice for large gardens.
  • Some users report inconsistent results in poor, untested soils.
• Amazon Customer Ratings and Reviews: 4.3/5 stars (500+ reviews). Customers praise the ease of use and noticeable growth within days, with one reviewer noting, “My corn shot up to 6 feet and produced full ears!” However, some mention reduced effectiveness in drought conditions or clay-heavy soils.
• Why It’s a Good Choice: This fertilizer’s liquid form and balanced nutrients make it perfect for gardeners seeking quick, reliable results without complex application methods. Its versatility suits both container and in-ground corn.
• Ideal Use Case: Home gardeners with small to medium corn patches or container setups looking for a convenient, effective solution.

2. Bioferti Corn Steep Liquor Powder Fertilizer (55-lb Bag)

• Compelling Description: Bioferti Corn Steep Liquor Powder is a powerhouse for organic corn farming, delivering a nutrient-rich, slow-release formula that boosts yields while maintaining eco-friendly practices. This OMRI-listed fertilizer is derived from corn steep liquor, a byproduct of corn processing, offering high nitrogen to fuel vigorous stalk and leaf growth. Its granular form ensures steady nutrient release, reducing the risk of burn and supporting long-term soil health. Designed for large-scale growers, this 55-pound bag covers extensive fields, making it cost-effective for commercial operations. Farmers report up to 10% yield increases, with stronger plants and better resistance to environmental stress, making it a staple for sustainable agriculture.

Buy It From Amazon

• Price: $589.95
• Key Features and Benefits:
  • Organic, OMRI-listed formula supports sustainable farming.
  • High nitrogen content promotes robust vegetative growth.
  • Slow-release granules provide consistent nutrition over weeks.
  • Enhances soil microbial activity for long-term fertility.
  • Covers large areas, ideal for commercial fields.
• Pros:
  • Excellent value for large-scale organic growers.
  • Improves soil structure and microbial health.
  • Reduces environmental impact compared to synthetic options.
• Cons:
  • Requires soil incorporation, less convenient for small gardens.
  • Higher upfront cost may deter hobbyists.
• Amazon Customer Ratings and Reviews: 4.5/5 stars (300+ reviews). Farmers highlight significant yield boosts and healthier plants, with one stating, “My corn yield increased by 8 bushels per acre!” Some note slower initial results compared to liquid fertilizers.
• Why It’s a Good Choice: Its organic composition and bulk size make it a top choice for farmers prioritizing sustainability and high yields over multiple seasons.
• Ideal Use Case: Large-scale organic corn production or serious hobbyists with expansive gardens.

3. Miracle-Gro Water Soluble All Purpose Plant Food (18-18-21)

• Compelling Description: Miracle-Gro’s Water Soluble All Purpose Plant Food is a trusted, high-potency fertilizer with an 18-18-21 NPK ratio, perfect for gardeners seeking a versatile, budget-friendly solution for corn and other crops. Its water-soluble granules dissolve quickly, delivering a potent dose of nitrogen for lush foliage, phosphorus for strong roots, and high potassium for robust cob development and stress resistance. Backed by Miracle-Gro’s satisfaction guarantee, this fertilizer is easy to apply with a watering can or hose-end sprayer, making it ideal for beginners and seasoned growers alike. Users report larger, tastier corn ears within weeks, making it a go-to for cost-conscious gardeners aiming for quick results.

Buy It From Amazon

• Price:  $10.83
• Key Features and Benefits:
  • High-potency 18-18-21 NPK ratio for comprehensive nutrition.
  • Water-soluble granules ensure fast nutrient delivery.
  • Suitable for corn and other vegetables, fruits, and flowers.
  • Easy application with standard gardening tools.
  • Proven brand with a money-back guarantee.
• Pros:
  • Affordable and widely available.
  • Delivers visible results within days.
  • Versatile for mixed-crop gardens.
• Cons:
  • Synthetic formula may not appeal to organic gardeners.
  • Risk of over-fertilization if not measured carefully.
• Amazon Customer Ratings and Reviews: 4.6/5 stars (2,000+ reviews). Users rave about bigger corn ears and vibrant plants, with one saying, “My corn doubled in size in two weeks!” Some caution about precise dosing to avoid leaf burn.
• Why It’s a Good Choice: Its affordability, ease of use, and rapid results make it ideal for beginners or gardeners with diverse crops on a budget.
• Ideal Use Case: Home gardeners with mixed crops or those seeking a cost-effective, fast-acting fertilizer.

4. Dr. Earth Home Grown Vegetable Fertilizer (4-6-3)

• Compelling Description: Dr. Earth Home Grown Vegetable Fertilizer is a premium organic option that combines a 4-6-3 NPK ratio with beneficial microbes and probiotics to nourish corn and enhance soil vitality. Crafted from natural ingredients like fish bone meal, kelp, and alfalfa, this OMRI-listed fertilizer promotes robust root systems and healthy cobs while improving long-term soil structure. Its granular form is easy to apply, making it suitable for both small gardens and larger plots. Gardeners praise its ability to produce sweeter, larger corn ears while supporting eco-friendly practices, making it a favorite for sustainable growers looking to balance yield and soil health.

Buy It From Amazon

• Price:  $15.99
• Key Features and Benefits:
  • 4-6-3 NPK ratio optimized for vegetables like corn.
  • Contains TruBiotic microbes for enhanced soil health.
  • OMRI-listed for organic gardening.
  • Supports root development and cob quality.
  • Safe for pets, people, and the environment.
• Pros:
  • Improves soil structure over time.
  • Easy to apply for beginners and experts.
  • Environmentally friendly with no synthetic chemicals.
• Cons:
  • Strong odor may be off-putting during application.
  • Smaller bag size offers limited coverage for large gardens.
• Amazon Customer Ratings and Reviews: 4.4/5 stars (800+ reviews). Gardeners love the organic benefits and healthier plants, with one noting, “My corn tasted sweeter and grew taller!” Some dislike the fishy smell during application.
• Why It’s a Good Choice: Its blend of organic nutrients and soil-enhancing microbes makes it ideal for eco-conscious gardeners prioritizing long-term soil health.
• Ideal Use Case: Organic home gardens or small farms seeking sustainable fertilization.

5. Jobe’s Organics Vegetable Fertilizer Spikes (3-4-4)

• Compelling Description: Jobe’s Organics Vegetable Fertilizer Spikes offer a hassle-free, organic solution for corn growers who value simplicity and precision. With a 3-4-4 NPK ratio, these pre-measured spikes deliver a steady dose of nutrients directly to the root zone, promoting strong stalks and healthy cobs without the risk of over-fertilization. Infused with Biozome, a proprietary blend of beneficial microbes, they enhance soil health and nutrient uptake. Ideal for small gardens or container-grown corn, these spikes are easy to insert and require no mixing, making them perfect for busy gardeners. Users report consistent growth and high-quality corn with minimal effort.

Buy It From Amazon

• Price: $14.99
• Key Features and Benefits:
  • Pre-measured spikes for precise, time-release nutrition.
  • 3-4-4 NPK ratio with added calcium, magnesium, and sulfur.
  • Biozome microbes improve soil and nutrient absorption.
  • OMRI-listed for organic gardening.
  • No mixing or measuring required.
• Pros:
  • Extremely low-maintenance application.
  • Safe for organic gardening and pets.
  • Long-lasting nutrients release up to 8 weeks.
• Cons:
  • Limited coverage for large fields or extensive plantings.
  • Spikes may break in hard, compacted soil.
• Amazon Customer Ratings and Reviews: 4.3/5 stars (600+ reviews). Users appreciate the ease of use and consistent results, with one saying, “Just push them in, and my corn thrived!” Some report uneven nutrient distribution in larger plots.
• Why It’s a Good Choice: The spikes’ simplicity and organic credentials make them perfect for gardeners seeking a low-effort, eco-friendly option.
• Ideal Use Case: Small gardens or container-grown corn where ease of application is a priority.

6. Family Farm and Feed CGM Granular Mix (2-lb Bag)

• Compelling Description: Family Farm and Feed CGM Granular Mix is a compact, organic fertilizer that doubles as a natural weed suppressant, making it a smart choice for small corn patches. Derived from corn gluten meal, this fertilizer provides a steady supply of nitrogen to fuel lush stalk and leaf growth while preventing weed germination, reducing the need for chemical herbicides. Its 2-pound bag is perfect for home gardeners with limited space, offering easy application and eco-friendly benefits. Users praise its dual-purpose functionality, reporting healthier corn and fewer weeds, making it a standout for organic gardening enthusiasts seeking a low-maintenance solution.

Buy It From Amazon

• Price: $16.99
• Key Features and Benefits:
  • High-nitrogen corn gluten meal supports vigorous corn growth.
  • Acts as a pre-emergent weed control, reducing garden maintenance.
  • OMRI-listed for organic gardening.
  • Easy-to-spread granules for uniform application.
  • Safe for pets and kids when applied as directed.
• Pros:
  • Combines fertilization and weed control in one product.
  • Affordable for small-scale gardeners.
  • Simple to apply with a spreader or by hand.
• Cons:
  • Small bag size limits coverage for larger plots.
  • Less effective in wet conditions or established weed areas.
• Amazon Customer Ratings and Reviews: 4.2/5 stars (400+ reviews). Users love the weed suppression, with one noting, “My corn grew tall, and I barely saw weeds!” Some report limited effectiveness in rainy seasons.
• Why It’s a Good Choice: Its unique weed-control feature and organic formula make it ideal for small-scale gardeners who want a multi-purpose product to simplify care.
• Ideal Use Case: Small organic gardens or raised beds where weed management is a concern.

7. Healthy Grow HGR 900 CG30 Corn Gluten (30-lb Bag)

• Compelling Description: Healthy Grow HGR 900 CG30 is a high-performance organic fertilizer that combines robust corn nutrition with natural weed prevention, tailored for larger organic gardens or small farms. Its corn gluten-based formula delivers high nitrogen for vigorous stalk growth and suppresses weed germination, offering a sustainable alternative to chemical treatments. The 30-pound bag provides ample coverage, making it cost-effective for medium to large plots. Farmers and gardeners report stronger plants and cleaner fields, with up to 15% yield improvements in organic setups, making this a top choice for eco-conscious growers aiming for high productivity.

Buy It From Amazon

• Price: $89.99
• Key Features and Benefits:
  • High-nitrogen formula promotes healthy corn development.
  • Organic weed suppression reduces reliance on herbicides.
  • Slow-release granules ensure consistent nutrient delivery.
  • OMRI-listed for organic certification.
  • Enhances soil microbial activity for long-term fertility.
• Pros:
  • Large bag sizes offer great value for bigger gardens.
  • Dual-purpose for fertilization and weed control.
  • Supports sustainable, chemical-free farming.
• Cons:
  • Requires careful application to avoid over-fertilization.
  • May attract pests like rodents if not stored properly.
• Amazon Customer Ratings and Reviews: 4.4/5 stars (350+ reviews). Users praise the weed control and yield boosts, with one farmer stating, “My corn field was weed-free and produced better than ever.” Some note slower initial results compared to synthetics.
• Why It’s a Good Choice: Its organic credentials, weed suppression, and bulk size make it perfect for growers balancing yield, sustainability, and weed management.
• Ideal Use Case: Medium to large organic corn fields or gardens with weed challenges.

8. MasterBlend Vegetable Fertilizer (4-18-38)

• Compelling Description: MasterBlend Vegetable Fertilizer is a high-potency, water-soluble fertilizer with a 4-18-38 NPK ratio, engineered for advanced gardeners and hydroponic corn growers seeking maximum yield and precision nutrition. Its low nitrogen, high phosphorus, and very high potassium content support robust root systems and exceptional cob development, making it ideal for corn in reproductive stages or hydroponic setups. This concentrated formula includes trace minerals like zinc and boron, critical for corn health, and dissolves easily for quick nutrient uptake. Users report up to 20% larger cobs and healthier plants, making it a favorite for those prioritizing efficiency and yield.

Buy It From Amazon

• Price: $24.99 
• Key Features and Benefits:
  • 4-18-38 NPK ratio optimized for fruiting and cob development.
  • Includes micronutrients for comprehensive plant nutrition.
  • Highly concentrated, covering large areas with small amounts.
  • Ideal for hydroponic, drip, or soil-based corn systems.
  • Fast-dissolving for immediate nutrient availability.
• Pros:
  • Cost-effective for large gardens or hydroponic setups.
  • Rapid nutrient uptake delivers quick results.
  • Versatile for various growing methods and crops.
• Cons:
  • Synthetic formula not suitable for organic gardening.
  • Requires precise mixing to avoid nutrient imbalances.
• Amazon Customer Ratings and Reviews: 4.5/5 stars (700+ reviews). Hydroponic growers praise the yield increases, with one noting, “My corn cobs were massive and sweet!” Some find the mixing process tricky for beginners.
• Why It’s a Good Choice: Its high-potency formula and micronutrient profile make it ideal for advanced growers seeking precise, high-yield results.
• Ideal Use Case: Hydroponic corn systems or in-ground gardens aiming for maximum cob production.

9. Burpee Organic Blood Meal Fertilizer (3-lb Bag)

• Compelling Description: Burpee Organic Blood Meal Fertilizer is a nitrogen-rich powerhouse designed to correct deficiencies and fuel explosive corn growth during the vegetative stage. With a 12-0-0 NPK ratio, this organic fertilizer delivers a concentrated dose of nitrogen to promote lush, green stalks and leaves, laying the foundation for healthy cobs. Made from dried blood, it’s OMRI-listed and enhances soil microbial activity, supporting long-term fertility. Its 3-pound bag is easy to apply as a top-dressing, making it ideal for gardeners addressing yellowing leaves or poor soil nitrogen. Users report rapid greening and taller stalks, making it a go-to for organic nitrogen boosts.

Buy It From Amazon

• Price: $16.30
• Key Features and Benefits:
  • 12-0-0 NPK ratio for intense nitrogen delivery.
  • OMRI-listed for organic gardening.
  • Promotes rapid foliage growth and stalk strength.
  • Enhances soil microbial health for sustainable fertility.
  • Easy to apply as a top-dressing or soil mix.
• Pros:
  • Highly effective for nitrogen-deficient soils.
  • Affordable for small to medium gardens.
  • Safe for organic use and environmentally friendly.
• Cons:
  • Strong odor may attract animals or be unpleasant.
  • Lacks phosphorus and potassium for balanced nutrition.
• Amazon Customer Ratings and Reviews: 4.4/5 stars (900+ reviews). Gardeners love the rapid growth, with one stating, “My corn went from yellow to green in a week!” Some dislike the odor and need for supplemental fertilizers.
• Why It’s a Good Choice: Its high nitrogen content and organic nature make it perfect for correcting deficiencies and boosting early corn growth.
• Ideal Use Case: Early-stage corn or gardens with low-nitrogen soils needing a quick boost.

10. AgroLiquid Corn Fertilizer

• Compelling Description: AgroLiquid Corn Fertilizer is a professional-grade liquid solution engineered for commercial farmers and serious hobbyists aiming for top-tier yields. Its specialized formula, backed by a six-year yield study, delivers a balanced nutrient profile with enhanced phosphorus availability to support root development and cob production. Designed for both planting and side-dressing, this fertilizer minimizes waste and maximizes efficiency, with farmers reporting yield increases of up to 5 bushels per acre. Its concentrated liquid form ensures rapid nutrient uptake, making it ideal for large-scale operations seeking consistent, high-quality results. AgroLiquid’s science-driven approach makes it a standout for precision agriculture.

Buy It From Amazon

• Price: $12.99
• Key Features and Benefits:
  • Balanced nutrient profile with enhanced phosphorus for roots.
  • Slow-release liquid for steady, efficient nutrition.
  • Proven to increase yields by up to 5 bushels per acre.
  • Suitable for planting, side-dressing, or foliar application.
  • Reduces nutrient runoff for eco-friendly farming.
• Pros:
  • High efficiency minimizes waste and costs.
  • Scientifically backed for reliable performance.
  • Versatile application methods suit various setups.
• Cons:
  • Higher cost per gallon compared to granular options.
  • Requires sprayer equipment for optimal application.
• Amazon Customer Ratings and Reviews: 4.5/5 stars (250+ reviews). Farmers praise the yield boosts, with one noting, “My corn produced an extra 4 bushels per acre!” Some mention the need for specialized equipment as a barrier.
• Why It’s a Good Choice: Its proven performance and efficient delivery make it ideal for farmers seeking high yields with minimal environmental impact.
• Ideal Use Case: Commercial corn fields or large-scale home gardens with access to sprayer equipment.

How to Choose the Right Corn Fertilizer

Selecting the best 10 corn fertilizers depends on your specific needs and growing conditions:

• Understand Your Soil: Conduct a soil test to determine pH (ideal: 5.5–7.0) and nutrient levels. Low nitrogen soils benefit from products like Burpee Blood Meal, while balanced soils suit LEAVES AND SOUL or Miracle-Gro.
• Match NPK to Corn Needs: Corn requires high nitrogen for foliage (e.g., 12-0-0 or 18-18-21) early on and balanced phosphorus/potassium for roots and cobs later. MasterBlend excels for cob development.
• Consider Growth Stage: Use starter fertilizers (e.g., AgroLiquid) at planting, high-nitrogen options (e.g., Burpee) during vegetative growth, and balanced formulas (e.g., Miracle-Gro) during tasseling.
• Organic vs. Synthetic: Organic options like Dr. Earth or Bioferti prioritize soil health and sustainability, while synthetics like MasterBlend offer faster results.
• Application Method: Granular (Healthy Grow) suits slow-release needs, liquid (AgroLiquid) provides quick uptake, and spikes (Jobe’s) simplify application.
• Budget and Scale: Bulk options like Bioferti are cost-effective for large fields, while smaller packages like Family Farm suit home gardens.

Application Tips for Maximum Corn Yield

• Soil Testing: Test soil before planting to identify deficiencies and adjust fertilizer choice.
• Starter Application: Apply fertilizer 2 inches below and to the side of seeds to prevent burn (e.g., AgroLiquid or Miracle-Gro).
• Side-Dressing: Add fertilizer at the 4-leaf stage or when plants reach 10 inches for optimal growth (LEAVES AND SOUL or Bioferti).
• Watering: Irrigate thoroughly after application to ensure nutrient absorption and prevent runoff.
• Avoid Over-Fertilization: Follow package instructions to prevent leaf burn or environmental harm, especially with synthetics like MasterBlend.
• Stop at Silking: Cease fertilization once corn silk appears to focus plant energy on cob development.

Common Mistakes to Avoid

• Over-Fertilizing: Excess nitrogen (e.g., from Miracle-Gro) can burn leaves or pollute waterways.
• Ignoring Soil pH: Corn struggles to absorb nutrients outside pH 5.5–7.0; test and amend soil as needed.
• Using Lawn Fertilizers: These often lack the high nitrogen corn needs (e.g., avoid 5-10-5 formulas).
• Applying in Dry Conditions: Without water, nutrients (especially from granular fertilizers like Bioferti) may not reach roots.
• Neglecting Micronutrients: Zinc and boron deficiencies can stunt corn; choose fertilizers like MasterBlend with trace minerals.

FAQs About Corn Fertilizers

• What is the best NPK ratio for corn? A 10-10-10 or higher nitrogen ratio (e.g., 18-18-21) works for early growth, with balanced phosphorus/potassium for later stages. Adjust based on soil tests.
• How often should I fertilize corn? Apply at planting, side-dress at the 4-leaf stage, and optionally at 10 inches. Stop at silking to avoid over-fertilization.
• Can I use lawn fertilizer for corn? Lawn fertilizers often have low nitrogen (e.g., 5-10-5) and aren’t ideal for corn’s high nutrient demands.
• Are organic fertilizers better for corn? Organic options (e.g., Dr. Earth) improve soil health long-term but may act slower than synthetics (e.g., Miracle-Gro).
• How do I know if my corn needs more fertilizer? Yellowing leaves indicate nitrogen deficiency, while weak stalks suggest potassium issues. Soil tests confirm specific needs.

Conclusion

The right corn fertilizer can transform your harvest, whether you’re a home gardener aiming for a few perfect ears or a commercial farmer targeting bushels of high-quality corn. Our top picks—LEAVES AND SOUL for convenience, Bioferti for organic farming, and Miracle-Gro for affordability—cater to diverse needs and budgets. By testing your soil, matching the fertilizer to your corn’s growth stage, and following proper application techniques, you can achieve healthier plants and higher yields. Explore these best 10 corn fertilizers on Amazon, check the latest prices and reviews, and start growing your best corn crop yet. As an Amazon Associate, we may earn a commission from qualifying purchases at no extra cost to you.