Top 5 Ranked Products
We analyzed millions of Amazon products to handpick the top recommendations just for you.

#1 Ranked
Ultimate 3-18-18 NPK- Lawn Food Quality Liquid Fertilizer- Easy to Use Concentrated Spray- Any Grass Type- Summer & Fall Nutrients- Simple Lawn Solutions - Turf Hardiness & Root Vigor (32 Ounce)
Price: $23.79
Rating: ★★★★★
ASIN: B06XB32CVV
Score: 93%
Overview:
The Ultimate 3-18-18 NPK Lawn Food is a concentrated liquid fertilizer designed to enhance lawn health, particularly during the summer and fall seasons. With a high concentration of phosphorus (18%) and potassium (18%), this fertilizer targets root development and overall lawn vigor. It is suitable for all types of grass, including Bermuda, St. Augustine, and Bluegrass, making it a versatile option for various lawn care needs. The product comes with a ready-to-use hose end sprayer that simplifies application, covering up to 3,200 square feet, which is beneficial for homeowners seeking convenience in lawn maintenance.
This fertilizer is particularly well-suited for lawns showing signs of phosphorus and potassium deficiencies, providing essential nutrients that promote strong root systems and resilience against stress. The low nitrogen content (3%) ensures that the focus remains on root development rather than excessive top growth, making it ideal for establishing new lawns. Manufactured in the USA by a family-owned business with extensive experience in the turf and agriculture industry, this product combines quality ingredients with user-friendly application methods.
Pros:
- High Nutrient Content: Contains 18% phosphorus and potassium, promoting robust root development.
- Versatile Application: Suitable for all grass types, accommodating diverse lawn care requirements.
- Easy Application: Comes with a hose end sprayer for straightforward usage, covering large areas efficiently.
Cons:
- Low Nitrogen Level: The low nitrogen content may not support rapid top growth for established lawns.
- Limited Visible Results: Phosphorus effects are subtle and may not provide immediate visible improvements.
- Potential Over-Application Risk: The concentrated formula may lead to over-application if not used carefully.

#2 Ranked
Advanced 16-4-8 Lawn Fertilizer - Liquid Lawn Food Spring & Summer Concentrated Spray - Any Grass Type- Fish and Seaweed Kelp- Balanced NPK - Simple Lawn Solutions (1 Gallon)
Price: $59.77
Rating: ★★★★☆
ASIN: B07CHSSTHQ
Score: 96%
Overview:
The Advanced 16-4-8 Lawn Fertilizer is a concentrated liquid lawn food designed for use in spring and summer, suitable for all grass types. With a balanced NPK ratio of 16-4-8, this fertilizer provides essential macronutrients—nitrogen, phosphorus, and potassium—necessary for promoting robust growth and vibrant color in lawns. The inclusion of fish and seaweed kelp enhances nutrient absorption, while the 1-gallon size can cover up to 12,800 square feet, making it an efficient option for large areas. Manufactured in the USA by a family-owned business with extensive experience in the turf industry, this product aims to support root development, improve drought resistance, and enhance overall lawn health.
Pros:
- Complete Nutrient Blend: The balanced NPK ratio effectively supports lawn greening and growth.
- Wide Coverage: One gallon covers an impressive 12,800 square feet, making it economical for larger lawns.
- All Grass Types: Formulated for compatibility with various grass types, ensuring versatility for different lawn needs.
Cons:
- Monthly Application: Requires regular monthly application, which may be inconvenient for some users.
- Liquid Form: Liquid fertilizers can be more challenging to apply evenly compared to granular options.
- Fish Emulsion Odor: The presence of fish in the formulation may produce an unpleasant smell during application.

#3 Ranked
Scotts Turf Builder SummerGuard Lawn Food with Insect Control, 13.35 lbs., 5,000 sq. ft.
Price: $38.74
Rating: ★★★★☆
ASIN: B00IMZVQ6M
Score: 96%
Overview:
Scotts Turf Builder SummerGuard Lawn Food with Insect Control is a comprehensive lawn care solution designed to nourish and protect your lawn during the hot summer months. This product not only provides essential nutrients to promote healthy grass growth but also includes an insecticide that targets a variety of common pests. The formula is suitable for all grass types and covers an area of up to 5,000 square feet, making it ideal for both small and large lawns.
In addition to its dual function as a fertilizer and insect control, this product is designed for easy application. It is recommended to apply it to a dry lawn when insect activity is first noticed, ensuring that both feeding and pest control are effectively managed. This makes it a convenient option for homeowners looking to maintain a lush, green lawn while minimizing the impact of damaging insects.
Pros:
- Dual Action: Combines fertilizer with insect control for comprehensive lawn care.
- Wide Coverage: One bag covers up to 5,000 sq. ft., suitable for various lawn sizes.
- Versatile: Can be used on any grass type, making it adaptable for different lawns.
Cons:
- Seasonal Application: Best used during the summer, limiting flexibility for year-round care.
- Requires Dry Conditions: Needs to be applied to a dry lawn, which may not always be convenient.
- Limited Pest Control: Only targets listed insects, potentially leaving other pests unaddressed.

#4 Ranked
Scotts Turf Builder Healthy Plus Lawn Food, 2-in-1 Fungicide and Fertilizer, Helps Grass Withstand Summer Stress, 4,000 sq. ft., 13.70 lbs.
Price: $34.97
Rating: ★★★★☆
ASIN: B0CJL2CCJX
Score: 85%
Overview:
Scotts Turf Builder Healthy Plus Lawn Food is a dual-action product designed to nourish and protect lawns from various diseases while promoting healthy growth. This 2-in-1 fungicide and fertilizer formulation not only provides essential nutrients to grass but also includes a broad-spectrum systemic fungicide that targets and controls up to 27 types of lawn diseases, such as brown patch and powdery mildew. Ideal for all grass types, this product is particularly effective when applied before disease symptoms emerge, making it a proactive solution for maintaining a healthy lawn during stressful summer conditions.
The 13.70 lb. bag covers an area of up to 4,000 square feet, making it suitable for medium to large lawns. By combining fertilization with disease prevention, Scotts Turf Builder Healthy Plus aims to enhance the overall resilience of grass, allowing it to better withstand heat and other stressors. This comprehensive lawn care solution is designed for ease of application and effectiveness, ensuring homeowners can achieve a lush and vibrant lawn with minimal effort.
Pros:
- Dual Action: Combines fungicide and fertilizer, providing comprehensive lawn care.
- Disease Control: Effective against 27 types of lawn diseases, promoting healthier grass.
- Wide Coverage: Covers up to 4,000 sq. ft., suitable for medium to large lawns.
Cons:
- Application Timing: Requires application before disease symptoms, which may be inconvenient.
- Grass Type Limitation: While suitable for all types, some specific grass varieties may require tailored care.
- Potential Overuse: Risk of over-fertilization if not applied as directed, which could harm the lawn.

#5 Ranked
7-0-20 Summer Lawn and Turf Stress Granular Fertilizer Blend (with Bio-Nite 45lb Bag - Covers 15,000 Square Feet - 7% Nitrogen - 3% Iron - 20% Potash - Safe for All Lawns - Apply All Year Round
Price: $79.99
Rating: ★★★★☆
ASIN: B08YS4CTRM
Score: 86%
Overview:
The 7-0-20 Summer Lawn and Turf Stress Granular Fertilizer Blend is designed to rejuvenate lawns during the warmer months, particularly when they are under stress. With a nutrient analysis of 7% nitrogen, 3% iron, and 20% potash, this fertilizer promotes healthy growth and vibrant color in grass. The inclusion of Bio-Nite enhances the soil's microbial activity, contributing to better nutrient uptake and overall lawn health. Suitable for application throughout the year, this product is versatile and can cover up to 15,000 square feet, making it ideal for larger properties.
This fertilizer blend is particularly beneficial for lawns that suffer from heat stress or other environmental challenges. The 3% iron content not only boosts color but also supports the overall health of the turf. The formulation is safe for all types of lawns, ensuring that homeowners can use it without worry. However, its high potash content may not be necessary for all lawns, depending on soil conditions, which could lead to potential over-fertilization if not monitored.
Pros:
- Coverage Area: Covers up to 15,000 square feet, making it suitable for large lawns.
- Nutrient Blend: Contains a balanced mix of nitrogen, iron, and potash for optimal lawn health.
- Year-Round Application: Safe for use throughout the year, providing flexibility in maintenance schedules.
Cons:
- High Potash Content: May lead to over-fertilization if not needed, depending on soil nutrient levels.
- Limited Specificity: Not tailored for specific lawn types, which could affect effectiveness.
- Potential for Burn: If over-applied, there is a risk of burning the lawn, particularly in hot weather.
Product Information & Tips
Overview
The query "best fertilizer for summer" reflects a common concern among gardeners and agricultural enthusiasts seeking to optimize plant growth during the warmer months. Summer presents unique challenges such as increased temperatures, higher evaporation rates, and varying nutrient needs for different plant species. Choosing the right fertilizer can significantly impact plant health, yield, and overall garden success.
In summer, plants often require a boost in nutrients to cope with the stress of heat and potential drought conditions. Fertilizers formulated for summer use typically contain higher levels of nitrogen, phosphorus, and potassium, which support robust growth and flowering. Understanding the specific needs of plants during this season is crucial for selecting the most effective fertilizer.
Key Criteria
1. Nutrient Composition:
- The balance of nitrogen, phosphorus, and potassium (N-P-K ratio) is vital for supporting plant growth, flowering, and fruiting, especially in the summer when plants are most active.
2. Release Type:
- Fertilizers can be slow-release or fast-acting. Slow-release fertilizers provide nutrients over an extended period, reducing the frequency of application and minimizing the risk of nutrient leaching during summer rains.
3. Soil Compatibility:
- The effectiveness of a fertilizer can depend on soil type and pH. Understanding the soil's nutrient profile helps in selecting a fertilizer that complements the existing soil conditions.
4. Plant Type:
- Different plants have varying nutrient requirements. Fertilizers should be tailored to specific plant types, such as vegetables, flowers, or shrubs, to ensure optimal growth during the summer months.
5. Environmental Impact:
- Choosing eco-friendly fertilizers can minimize environmental harm. Organic options often improve soil health and reduce the risk of chemical runoff, making them a sustainable choice for summer gardening.
Frequently Asked Questions
Q1: What is the best N-P-K ratio for summer fertilizers?
A1: A balanced N-P-K ratio of 10-10-10 or 5-10-5 is often recommended for summer, as it supports overall plant health and flowering.
Q2: How often should I apply fertilizer during the summer?
A2: It depends on the type of fertilizer used; slow-release fertilizers may require application every 6-8 weeks, while fast-acting types may need more frequent applications every 2-4 weeks.
Q3: Can I use winter fertilizers in summer?
A3: It is not advisable, as winter fertilizers are formulated for different growing conditions and may not meet the nutrient needs of plants during the summer.
Q4: Is organic fertilizer better for summer gardening?
A4: Organic fertilizers can be beneficial as they improve soil health, enhance microbial activity, and provide a steady nutrient supply, making them suitable for summer gardening.
Q5: What signs indicate that my plants need fertilization in summer?
A5: Signs include yellowing leaves, stunted growth, poor flowering, and overall weak plant vigor, indicating a potential nutrient deficiency.
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