Best Organic Lawn Fertilizer Spray in 2025
Updated on August 2025
#1
Recommended
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- Liquid lawn fertilizer booster with iron and nitrogen for enhanced greening
- Ready-to-use hose end sprayer for easy application covering 3,200 square feet
- Contains 6% nitrogen to support growth for a lush lawn
- Blended with 5% iron to intensify lawn color
- Compatible with existing fertilizer programs to enhance nutrient absorption
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- Liquid lawn fertilizer booster with iron and nitrogen for enhanced greening
- Ready-to-use hose end sprayer for easy application covering 3,200 square feet
- Contains 6% nitrogen to support growth for a lush lawn
- Blended with 5% iron to intensify lawn color
- Compatible with existing fertilizer programs to enhance nutrient absorption
#2
Value for Money
21% Off
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- NPK Lawn Food with a nutrient ratio of 16-4-8, combining essential macronutrients for optimal lawn health.
- Formulated for easy application, promoting greening and growth across various grass types.
- Includes 4% Phosphorus to support root development and early plant vigor.
- Features 8% Potassium to improve drought resistance and nutrient transport within plants.
- Ideal for maintaining lawn health, enhancing greenness, promoting growth, and addressing macronutrient deficiencies.
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- NPK Lawn Food with a nutrient ratio of 16-4-8, combining essential macronutrients for optimal lawn health.
- Formulated for easy application, promoting greening and growth across various grass types.
- Includes 4% Phosphorus to support root development and early plant vigor.
- Features 8% Potassium to improve drought resistance and nutrient transport within plants.
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#3
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- Seven species blend of organic seaweed and kelp including Ascophyllum Nodosum and Chlorella Vulgaris.
- Processed to retain natural enzymes, ensuring a clean kelp extract without fibrous pulp.
- Easy application for all plants; suitable for every stage of growth without risk of overuse.
- Applicable for houseplants, vegetable gardens, and lawns to promote healthy green growth.
- Developed in the USA by botanists and plant chemists using high-quality ingredients.
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- Seven species blend of organic seaweed and kelp including Ascophyllum Nodosum and Chlorella Vulgaris.
- Processed to retain natural enzymes, ensuring a clean kelp extract without fibrous pulp.
- Easy application for all plants; suitable for every stage of growth without risk of overuse.
- Applicable for houseplants, vegetable gardens, and lawns to promote healthy green growth.
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#4
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- OMRI Listed Organic Seaweed & Kelp Fertilizer: A natural liquid kelp fertilizer that enhances plant health by optimizing soil conditions and improving nutrient uptake without harmful chemicals.
- Natural Plant Food from Ascophyllum Nodosum: This seaweed extract boosts plants' tolerance to extreme conditions like heat and drought, enhancing chlorophyll levels for greener leaves and increased sugar content.
- Widely Used for Improved Plant Nutrition: Suitable for commercial and home gardening, this seaweed fertilizer promotes better nutrient uptake and supports overall plant well-being.
- Simple Application for Effective Results: Mix 2 ounces of the liquid concentrate with a gallon of water to cover up to 1,000 sq ft; ideal to spray during cooler parts of the day when plant stomata are open.
- Reliable Organic Option: GS Plant Foods provides high-quality, cost-effective organic fertilizers designed to yield consistent results across various gardening scenarios.
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- OMRI Listed Organic Seaweed & Kelp Fertilizer: A natural liquid kelp fertilizer that enhances plant health by optimizing soil conditions and improving nutrient uptake without harmful chemicals.
- Natural Plant Food from Ascophyllum Nodosum: This seaweed extract boosts plants' tolerance to extreme conditions like heat and drought, enhancing chlorophyll levels for greener leaves and increased sugar content.
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#5
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- Includes an easy-to-use sprayer for precise application, covering up to 3,200 square feet.
- Contains 28% nitrogen, essential for chlorophyll production and promoting a green, dense lawn.
- Designed to quickly address nitrogen deficiencies and enhance lawn greening and growth.
- Suitable for all grass types, including Bermuda, St. Augustine, and Kentucky Bluegrass.
- Serves as a key macronutrient supplement, enhancing the effectiveness of granular fertilizers.
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- Includes an easy-to-use sprayer for precise application, covering up to 3,200 square feet.
- Contains 28% nitrogen, essential for chlorophyll production and promoting a green, dense lawn.
- Designed to quickly address nitrogen deficiencies and enhance lawn greening and growth.
- Suitable for all grass types, including Bermuda, St. Augustine, and Kentucky Bluegrass.
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#6
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- Grass fertilizer combo pack enhances lawn appearance with essential nutrients.
- 22-0-3 liquid fertilizer promotes plant growth and improves soil health using natural ingredients like nitrogen, iron, seaweed, and potassium.
- For optimal results, apply Lawn Kickstart every 4-6 weeks during growing season (60-89°F), ideally as the initial fertilizer.
- Green Machine should also be applied every 4-6 weeks in the same temperature range, but avoid application after mid-October.
- Regular maintenance of your lawn can be achieved with Green Machine fertilizer, tailored to your local soil conditions.
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- Grass fertilizer combo pack enhances lawn appearance with essential nutrients.
- 22-0-3 liquid fertilizer promotes plant growth and improves soil health using natural ingredients like nitrogen, iron, seaweed, and potassium.
- For optimal results, apply Lawn Kickstart every 4-6 weeks during growing season (60-89°F), ideally as the initial fertilizer.
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#7
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- 16-4-8 liquid lawn food fertilizer provides essential macronutrients for optimal grass health.
- Easy application with various sprayers or watering cans, suitable for different lawn types and garden plants.
- Nitrogen (16%) promotes green coloring and growth, while phosphorus (4%) supports root development.
- Potassium (8%) enhances drought resistance and lawn durability, enriching soil with seaweed and fish emulsion.
- Suitable for various grass types and garden plants, manufactured in the USA by a family-owned company with extensive industry experience.
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- 16-4-8 liquid lawn food fertilizer provides essential macronutrients for optimal grass health.
- Easy application with various sprayers or watering cans, suitable for different lawn types and garden plants.
- Nitrogen (16%) promotes green coloring and growth, while phosphorus (4%) supports root development.
- Potassium (8%) enhances drought resistance and lawn durability, enriching soil with seaweed and fish emulsion.
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#8
11% Off
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- Kills common broadleaf weeds while providing nitrogen boost to the lawn
- Controls dandelion, clover, ground ivy, and other listed weeds
- Best applied when weeds are actively growing
- Suitable for various grass types including Bluegrass, Fescue, and Bermudagrass
- Covers up to 6,000 sq. ft. for warm season lawns and 4,000 sq. ft. for cool season lawns
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- Kills common broadleaf weeds while providing nitrogen boost to the lawn
- Controls dandelion, clover, ground ivy, and other listed weeds
- Best applied when weeds are actively growing
- Suitable for various grass types including Bluegrass, Fescue, and Bermudagrass
- Covers up to 6,000 sq. ft. for warm season lawns and 4,000 sq. ft. for cool season lawns
#9
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- Concentrated liquid micronutrient blend enhances color and vigor of turf, garden, and plants.
- Contains essential micronutrients including iron, manganese, and zinc.
- Compatible with various grass types such as St. Augustinegrass and Kentucky Bluegrass.
- Applicable for lawns, vegetables, flowers, and more, catering to diverse gardening needs.
- Nutrients are quickly absorbed to address and prevent deficiencies.
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- Concentrated liquid micronutrient blend enhances color and vigor of turf, garden, and plants.
- Contains essential micronutrients including iron, manganese, and zinc.
- Compatible with various grass types such as St. Augustinegrass and Kentucky Bluegrass.
- Applicable for lawns, vegetables, flowers, and more, catering to diverse gardening needs.
- Nutrients are quickly absorbed to address and prevent deficiencies.
#10
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- High in phosphorus and potassium to address nutrient deficiencies and maintain lawn health.
- User-friendly application with a hose end sprayer for even distribution over large areas.
- Suitable for various grass types, including Bermuda, St. Augustine, and more.
- Effective starter fertilizer that supports strong root development and overall plant growth.
- Contains 18% phosphorus to enhance root establishment, crucial for turf development.
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- High in phosphorus and potassium to address nutrient deficiencies and maintain lawn health.
- User-friendly application with a hose end sprayer for even distribution over large areas.
- Suitable for various grass types, including Bermuda, St. Augustine, and more.
- Effective starter fertilizer that supports strong root development and overall plant growth.
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