Best Liquid Fertilizer For Large Lawns: - Our Top Picks 2024

OMRI ​ORGANIC LISTED SEAWEED & KELP FERTILIZER: Liquid Kelp is a natural plant food that provides a range of benefits for plant health and growth. OMRI listed for organic use, GS Plant Foods Liquid Seaweed Fertilizer is a completely natural, seaweed extract fertilizer for plants. Our liquid seaweed will help stimulate natural root growth, mineral uptake and overall plant growth and vigor. This can be applied to any type of soil or plant without concern for waste or harmful chemicals.

ONE OF NATURE’S ‘MIRACLE’ PLANT FOODS: Made from the finest seaweed plant Ascophyllum Nodosum, this is one of nature’s miracle plant foods. Our seaweed extract greatly increases your plant’s resistance to stressors such as excessive heat, wind, drought conditions and more. The seaweed fertilizer for plants will increase the bloom set and size of flowers and fruit. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants.

OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, kelp liquid fertilizer acts as an efficacious growth promoter. GS Plant Foods sea kelp fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. Using GS Plant Foods seaweed plant fertilizer will lead to healthier crop yields and general plant well being.

EASY TO APPLY FOR NATURAL GREAT RESULTS: Apply liquid kelp to improve specific growth stages. To promote additional buds, apply when plants are beginning to bud. To extend the shelf life of fruits and vegetables, spray 10 days before harvesting. To lengthen the life of cut flowers, spray a day or two before cutting. In lieu of trying to catch specific growth stages, apply every 4 to 7 days. This liquid kelp should be sprayed in the morning or late afternoon when the leaves stoma are open.

TRUSTED & RELIABLE: At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality organic seaweed fertilizer products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are organic, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you're growing or what medium in which your plants are growing.

Humic Fulvic Acid Blend: Concentrated Liquid Organic Carbon Derived from the Highest Quality Humate Source. 1 Gallon, 128 Ounce Bottle.

Perk up your Lawn, Garden, and Houseplants: Enhance your fertilizer program and help your lawn and garden uptake nutrients more efficiently. Humic Acid to support enhanced fertilizer efficiency for a better quality lawn, garden, and plants.

Great for All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass

Application Rates for Garden: Use on Indoor Plants, Flowers, Tomato Plants, Vegetables, Fruit, Citrus, Garden Landscape, Hardy trees, Seeding, Over seeding and New sod

Used on Commercial Agriculture and Turf: Manufactured in the United States, Root Hume has been used by Farmers and Professionals all over the world

Produced In The USA: Root Hume is Manufactured in the United States of America, by a Family Owned Business with over 25 Years of Former Experience in the Commercial Professional Turf and Agriculture Industry.

Concentrated Liquid Humic Solution: Root Hume Should Be Applied Using a Hose-end Sprayer, Backpack Sprayer, Spray Tank or Pump-up Sprayer When Applying Solution To a Lawn or Watering Can When Applying To Plants.

Can Be Used Alongside Fertilizer Program: Can Be Used With Your Current Plant Food, Garden Feed & Turf Grass Fertilizer Program

Feeds and greens while watering your lawn

Apply to any grass type

Use when turf is actively growing

Improved greening (when compared to previous Scotts Liquid Turf Builder Lawn Fertilizer and applied as directed)

Feeds and strengthens to help protect against future problems

Complete NPK Lawn Food: 16-4-8 is the perfect blend of key macronutrients. This lawn liquid food turf fertilizer also contains Seaweed & Fish.

Contains High Quality Feed Grade Ingredients: Nourish your lawn to health with safe, pure liquid Nutrients. We believe in nourishing your lawn to health the right way.

1 Gallon Sizes covers 12,800 square feet. This complete Nitrogen, Phosphate and Potash formula gives your grass greening & growth while providing nutrients for roots, health and turf strength.

All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass

Produced In The United States: 16-4-8 is manufactured in the United States of America, by a family owned business with 25 years of former experience in the commercial professional turf industry.

16-4-8 contains 16% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

Blended with 4% Phosphorus. Phosphorus encourages root development, and enhances vigorous plant development in early stages.

Blended with 8% Potassium. Potassium enhances plant tolerance to extreme temperatures and drought, while also playing an essential role in the transfer of nutrients and regulation of water and nutrients.

Contains Seaweed and Fish. Seaweed & Fish Emulsion provides rich, organic matter to soil for a more effective Lawn Food and optimum nutrient uptake.

16-4-8 Lawn Food is best to be used to maintain and feed your lawn, if you want to enhance the green of your lawn, if you are trying to boost vertical and lateral growth, and/or if your lawn is deficient in Macronutrients like Nitrogen, Phosphorus and Potassium.

BENEFITS: All purpose fertilizer designed to be used throughout the growing season that provides readily available nutrients AND extended, long lasting nitrogen (Product contains 50% SLOW RELEASE NITROGEN (SRN))

BONUS: Micro-nutrients aid in plant growth, aesthetic appeal, and overall plant health.

DIRECTIONS FOR ORNAMENTALS: Mix 1-2 oz of fertilizer to 1 gallon of water and water plants generously. Use fertilizer once every two weeks. DIRECTIONS FOR TURF: Use 3 oz. of fertilizer for every 1000 sq. ft. Mix in a spray tank at ratio of 1-3 oz per gallon of water. Fertilize once every 2-4 weeks.

GUARANTEED ANALYSIS: 18% Nitrogen | 3% Available Phosphoric Acid | 6% Soluble Potash | .05% Copper .1% Iron .05% Manganese .05% Zinc

Hand-crafted, Micro-brewed liquid lawn fertilizer for all lawn and pasture. With mycorrhizae, humic acid, enzymes, and more.

100% nutrition: Macros & Micros, with Iron and balanced N-P-K.

Perfect for tow behind tank and hose-end spraying! Instant Green.

1 gallon treats a 5,000 sq ft lawn a minimum 8 times with a hose-end sprayer.

Encourages Greening : Darker Green Liquid Iron contains Nitrogen and Iron to help you achieve that dark green color.

Nitrogen and Iron Formula: Darker Green Liquid Iron was developed to perk up lawn, deepen the green of your lawn, and enhance existing minerals in the soil for a vigorous lawn!

Maintain Lawn & Treat Nutrient Deficiencies: Darker Green Liquid Iron is perfect for maintaining lawn vigor or treating lawns deficient in Iron.

Micronutrients: Darker Green Liquid Iron Contains Micronutrients like Iron and Manganese to Carry Out Essential Plant Functions.

Great For All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass.

Application Rates for Lawn and Garden: Versatile Formula can be used on Turf Grass, Ornamentals, Young Plants, Flower Beds, Potting Soil, Young Trees, Garden and Hardy Plants.

Used Commercially: Used by Farmers and Professionals on Agriculture and Turf Grass all around the world.

Concentrated Solution: Great to enhance the deep green of your lawn, treat deficiencies or use on garden.

Liquid Iron Blend: Iron is essential to the plant’s production of chlorophyll.

Proprietary Fertilizers Made in the USA: All Simple Lawn Solutions products are expertly manufactured with our proprietary manufacturing method, and proudly in the USA by a family-owned company.

ULTIMATE LIQUID NITROGEN FERTILIZER: This liquid lawn food supplement has an ultra-high nitrogen formula to promote green grass and quick growth. Easily turn yellow & nitrogen deficient grass into a lush thick green!

28-0-0 QUICK & SLOW RELEASE TECHNOLOGY: This 2-in-1 liquid lawn fertilizer formula provides 70% quick-release nitrogen for rapid green and growth and 30% slow-release nitrogen for ongoing growth between applications.Get the best of both worlds in 1 easy application.

WORKS WITH ALL GRASS TYPES: Whether you have warm- or cold-season grass, this is the perfect liquid grass food for quick green-up. It's super-effective in making your lawn green and to achieve consistent growth. Ideal for both new and old lawns.

Apply Nitrogen to Your Lawn Quickly: PetraTools created our NPK lawn booster to be simple and easy to use. Mix 5oz of liquid nitrogen per gallon of water for maintenance or 10 oz per gallon to correct nitrogen levels. Treats up to 12,800 Sq. Ft. for maintenance or 6,400 Sq. Ft. of nitrogen deficient grass. For best results, use a PetraTools sprayer to evenly spray mixture across lawn.

American Family-Owned Company & USA Support: PetraTools is a USA-based company located in Carlisle, Pennsylvania. All PetraTools products have a 100% satisfaction guarantee and excellent USA customer service members waiting by the phones to answer any questions you may have. PetraTools continues to work hard to deliver top-quality sprayers & solutions to keep your home, lawn, and places of business clean, green, and safe.

High Phosphorus, High Potassium Lawn Food: If your lawn is showing symptoms of a Phosphorus and Potassium deficiency or if you want to maintain lawn health then this is the correct fertilizer for you!

Made With High Quality Feed Grade Ingredients: Nourish your lawn to its top potential with quality liquid lawn Nutrients.

Easy To Use: Designed to be easily applied. This high Phosphorus & Potassium Lawn Food gives your lawn the nutrients it needs for strong root development, vigor, and strength.

Can Be Used on All Grass Types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Palmetto & Bluegrass Lawns.

Easy to Use: Our 3-18-18 Lawn Fertilizer Food comes with a ready-to-use hose end sprayer that applies the perfect ratio of product for lawn applications. Covers up to 3,200 square feet, when using the attached sprayer.

Great Starter Fertilizer: High Phosphorus and Potassium Lawn Food provides essential Phosphorus to promote plant development, and is highly recommended when establishing a lawn.

Contains 3% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense, attractive lawn. Nitrogen will show a color response in the lawn if a deficiency is present.

Contains 18% Phosphorus. Phosphorus encourages root development, and is essential for turf establishment. Phosphorus effects on turf are usually more subtle and, while not as readily visible, are still very important.

Contains 18% Potassium. Potassium can enhance the plant’s endurance to stress if a deficiency is present. The application of Potassium will generally not show a visible response.

Produced In The USA: 3-18-18 is Manufactured in the United States of America, by a Family Owned Business with over 25 Years of Former Experience in the Commercial Professional Turf and Agriculture Industry.

Complete NPK Lawn Food: 16-4-8 is the perfect blend of key macronutrients. This lawn liquid food turf fertilizer also contains Seaweed & Fish.

Contains High Quality Feed Grade Ingredients: Nourish your lawn with pure liquid Nutrients in a ready to use sprayer

Easy To Use: Designed to be easily applied. This complete Nitrogen, Phosphate and Potash formula gives your grass greening & growth while providing nutrients for lush lawns

All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass

Produced In The United States: 16-4-8 is manufactured in the United States of America, by a family owned business with 25 years of former experience in the commercial professional turf industry.

Blended with 16% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

Blended with 4% Phosphorus. Phosphorus encourages root development, and enhances vigorous plant development in early stages.

Blended with 8% Potassium. Potassium enhances plant tolerance to extreme temperatures and drought, while also playing an essential role in the transfer of nutrients and regulation of water and nutrients.

Contains Seaweed and Fish. Seaweed & Fish Emulsion provides rich, organic matter to soil for a more effective Lawn Food and optimum nutrient uptake.

16-4-8 Lawn Food is best to be used to maintain and feed your lawn, if you want to enhance the green of your lawn, if you are trying to boost vertical and lateral growth, and/or if your lawn is deficient in Macronutrients like Nitrogen, Phosphorus and Potassium.

Liquid Iron, Nitrogen and Micronutrient Blend: Lawn Energizer booster provides essential nutrients needed to darken the green of your lawn

Covers 3,200 SQ. FT: Commercial grade intense booster treatment in a ready-to-use hose end sprayer

High Quality Nutrients: Lawn Energizer Booster is a 6-0-0 Nitrogen, Iron and Micronutrient blend.

All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass

Produced In The United States: Lawn Energizer is manufactured in the United States of America, by a family owned business with 25 years of former experience in the commercial professional turf industry.

28-0-0 Liquid Lawn Food Nutritional Supplement: High Nitrogen Formula. Nitrogen aids in the formation of chlorophyll where plants get their green coloring. The addition of Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

The Power of Quick Release and Slow Release Nitrogen Fertilizer: 70% quick release nitrogen to provide quick nutrient absorption 30% slow release nitrogen keeps your lawn feed in between applications.

Contains High Quality Feed Grade Compounds: Nourish your lawn with liquid nutrients. Designed to be quickly & easily applied in a ready to use sprayer bottle.

Can Be Used on All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass.

Easy to Use: Our 28-0-0 Lawn Fertilizer Food comes with a ready-to-use hose end sprayer that applies the perfect ratio of product for lawn applications. Covers up to 3,200 square feet, when using the attached sprayer.

28-0-0 contains 28% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

High Nitrogen Formula: This High Nitrogen fertilizer was developed to perk up the lawn, by quickly correcting a Nitrogen deficiency in the soil for a vigorous Turf Grass. Nitrogen Encourages Greening & Vertical/Lateral Growth for a Thicker, Greener Lawn if a nutrient deficiency is present.

Maintain Lawn & Treat Nutrient Deficiencies: 28-0-0 Lawn Food is perfect for maintaining lawn vigor or treating lawns deficient in Nitrogen.

Essential Macronutrient: High Nitrogen Liquid Lawn Food contains Nitrogen which is the most frequently used macronutrient and is essential to maintain lawn vigor, color, and quality. Nitrogen Encourages Greening & Vertical/Lateral Growth for a Thicker, Greener Lawn.

28-0-0 Lawn Food is best to be used if you want to darken the green of your lawn, if you are trying to boost vertical and Lateral Growth, if your lawn is deficient in Nitrogen.

15-0-15 Phosphorus-free Liquid Lawn Food Nutritional Fertilizer: If you want to maintain lawn health or if your lawn symptoms of a Nitrogen & Potassium deficiency then this is the correct fertilizer for you.

The Power of Nitrogen & Potassium Blended with Humic Acid: Intensify green and growth while providing key nutrients for turf hardiness.

Blended with 15% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

Contains 15% Potassium. Potassium can enhance the plant’s endurance to stress if a deficiency is present. Potassium is involved in carbohydrate formation, photosynthesis, enzyme activation, and the formation of proteins.

Blended with Humic Acid: Our Humic Acid is derived from the highest quality humate source, leonardite. Leonardite is considered by many to be the highest quality form of Humic Acid

Attached Easy to use Sprayer: 15-0-15 Liquid lawn Food comes with an attached ready to use sprayer. Hook to your hose to apply. Covers 3,200 square feet.

Can Be Used on All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Palmetto & Bluegrass.

Use Alongside Fertilizer Program. 15-0-15 Liquid Fertilizer can be used with your current fertilizer program. Great as a supplement to granular fertilizer programs for a quick plant response.

Produced In The United States: 15-0-15 is manufactured in the United States of America, by a family owned business with over 25 years of former experience in the commercial professional turf industry.

ULTIMATE BALANCED LAWN FERTILIZER: PetraTools 16-4-8 Liquid Fertilizer is the perfect blend of well-balanced support of macronutrients to support all grass types. The nitrogen, phosphorous and potash mix provide a maximum boost for lawn growth and green grass. The included high-purity humates and supplementary potassium encourages deep root development.

16-4-8 NUTRIENT FORMULA: This NPK formula contains 16% nitrogen, 4% phosphorus, & 8% potassium for a bright grass color, root and plant development, and tolerance to intense temperatures. It's ideal for use in any type of grass and is a pet-friendly fertilizer for lawns.

NITROGEN FERTILIZER QUICK & SLOW RELEASE TECHNOLOGY: This 2-in-1 nitrogen lawn fertilizer formula provides both quick-release nitrogen for rapid green and growth and slow-release nitrogen for ongoing growth between applications. Get the best of both worlds in 1 easy application.

EASY APPLICATION: PetraTools created our NPK lawn booster to be simple and easy to use. Mix 5oz of fertilizer per gallon of water for maintenance or 10 oz per gallon to correct deficient levels. Treats up to 1,600 Sq. Ft. for maintenance or 800 Sq. Ft. for NPK deficient grass. For best results, use a PetraTools sprayer to evenly spray mixture across lawn & apply every 14 days.

American Family-Owned Company & USA Support: PetraTools is a USA-based company located in Carlisle, Pennsylvania. All PetraTools products have a 100% satisfaction guarantee and excellent USA customer service members waiting by the phones to answer any questions you may have. PetraTools continues to work hard to deliver top-quality sprayers & solutions to keep your home, lawn, and places of business clean, green, and safe.

Economical Size: Refill your Simple Lawn Solutions: Growth Booster sprayer up to four times. Can also be used with a pump up or other sprayer.

Commercial Size: Covers up to 12,000 square feet. Refill Growth Booster sprayer bottle or use with a pump up or other sprayer. Easy to use

Great for New Sod & New Seeding: Advanced Formula increases vertical and lateral growth. Accelerate the growth of established turf & get ready to mow.

All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Palmetto & Bluegrass. Designed for the Spring & Summer Seasons.

Produced In The United States: Growth Booster is manufactured in the United States of America, by a family owned business with 25 years of former experience in the commercial professional turf industry.

Great Starter Fertilizer: Growth Booster Lawn Fertilizer provides essential Phosphorus to promote increased seed germination, and is highly recommended for seeding a lawn.

Growth Booster contains 6% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.

Growth Booster contains 18% Phosphorus. Phosphorus encourages root development, and enhances vigorous plant development in early stages. Phosphorus is essential for a successful seeding and for establishing sod.

Blended with Humic Acid helps to increase Cation Exchange Capacity, promoting the release of locked-up nutrients in the soil to increase the transfer of fertilizer and boost plant growth.

Growth Booster is best to be used when Establishing your lawn with Sod, when establishing your lawn with seed, if you are trying to Booster vertical and Lateral Growth, and/or if your lawn is deficient in Phosphorus.