Best Potassium Fertilizer For Lawn: 10 Options Compared

#1 · Best Overall

1. The Andersons Potassium Fertilizer

• Form: Granules

Best for: Spreader-fed deficient lawns.

Why it ranks #1: Made specifically for potassium-deficient lawns, this 0-0-25 granular supplement covers up to 6,000 square feet and suits all turf types.

Small particles are the key practical feature of The Andersons 0-0-25: they support complete, uniform coverage when applied with a spreader. This professional-grade granular fertilizer is aimed at lawns with potassium deficiencies and can supplement an existing feeding program across the growing season.

The application guidance calls for actively growing, dry grass, then filling and adjusting a spreader to the recommended rate using the spreader settings table. That makes it a clear fit for lawn owners already equipped to calibrate granular applications. The 18-pound bag is listed to cover up to 6,000 square feet, helping buyers assess lawn-scale use. The product is for all turf types and may be used any time during the growing season.

Skip it if you need a liquid application or cannot apply to actively growing, dry grass; FIVE STAR TURF 0-0-25 is a liquid option.

A strong match for lawn owners treating potassium deficiency with a calibrated spreader and dry, actively growing turf. Its coverage information helps with lawn-scale planning, while the application condition rules out wet or dormant grass.

Listed on Amazon as: The Andersons Professional Potassium Fertilizer 0-0-25-18 lbs. Covers up to 6,000 sqft.

#2 · Best Hose-End Liquid

2. Simple Lawn Solutions 0-0-25

• Form: Liquid
• Weight: 2 lb

Best for: Summer and fall lawn feeding.

Why it ranks #2: This lawn-focused 0-0-25 liquid works on any grass type and uses a hose sprayer, with summer and fall use highlighted.

A 0-0-25 liquid formula brings high-potassium lawn food to hose-end application, letting homeowners spray an even treatment across turf. Simple Lawn Solutions positions it for summer and fall use, and says potassium can help address deficiency and support hardiness when lawns face temperature changes or other stressful conditions.

The concentrated liquid is applied by attaching the sprayer to a hose, adjusting coverage settings, and spraying the lawn evenly. That workflow avoids spreading granules and gives the user a direct way to cover turf. Its 0-0-25 analysis emphasizes potassium rather than nitrogen or phosphorus, making it a supplement for a feeding schedule or a response to potassium deficiency, not a complete balanced fertilizer. The listing says it can be used on any grass type.

Skip it if you want a dry granular product spread without a hose; The Andersons Professional Potassium Fertilizer is a granular lawn option.

A practical pick for lawn owners seeking liquid potassium support during summer or fall, especially when supplementing an existing feeding schedule. Its hose-sprayer method suits accessible turf, but not buyers who prefer spreading dry granules.

Listed on Amazon as: Simple Lawn Solutions – High Potassium Lawn Food Liquid Fertilizer 0-0-25 – Concentrated Spray – Turf Grass Vigor and Plant Hardiness – Summer and Fall – Any Grass Type (32 Ounce)

#3 · Best Chloride-Free

3. Five Star Turf Liquid Potassium

• Form: Liquid
• Weight: 2 lb

Best for: Chloride-sensitive turf care.

Why it ranks #3: Its 0-0-25 liquid formula is made for turf, lawns, and sports fields, and the listing specifies chloride-free, low-salt-index potassium.

A chloride-free 0-0-25 liquid with a low salt index targets turf owners seeking potassium for stress tolerance without chloride. FIVE STAR Turf lists use on lawns and sports fields, and describes fast-acting potassium with foliar and root uptake for varied turf-care routines.

The liquid format is paired with stated foliar and root uptake, giving turf managers two listed pathways for potassium availability. Its chloride-free potassium sulfate formulation and low salt index are especially relevant where chloride sensitivity is a concern. The product is marketed for turf, lawns, and sports fields, so it can serve residential grass as well as field settings. The supplied facts do not provide a mixing rate or repeat interval, so buyers should consult the product directions for application details.

Skip it if you need a listed turf dosage and repeat schedule; Pendelton Turf Supply 0-0-26 provides both in its directions.

FIVE STAR Turf suits managers of lawns and sports fields who prioritize chloride-free potassium and a low salt index. Its liquid, foliar-and-root uptake positioning is useful, but application planning requires directions beyond the supplied facts.

Listed on Amazon as: Five Star Turf Liquid Potassium Fertilizer 0-0-25 KTS for Stress Tolerance, Foliar & Root Uptake – No Chlorides, Low Salt Index with Fast-Acting Potassium for Turf, Lawns & Sports Fields – 1 Quart

#4 · Best Foliar Directions

4. Pendelton Turf Phosphite 0-0-26

• Form: Liquid
• Weight: 2 lb

Best for: Scheduled foliar turf feeding.

Why it ranks #4: This turf-suitable 0-0-26 liquid provides a stated lawn rate of 2–6 ounces per 1,000 square feet and a 2–4 week interval.

A spray-tank liquid with a turf rate of 2–6 ounces per 1,000 square feet makes this 0-0-26 phosphite fertilizer especially suited to measured foliar feeding. Pendelton Turf Supply links the formula to plant defenses during high stress, while its stated repeat interval gives lawn care a defined schedule.

For turf, the listed directions call for mixing 2–6 ounces per 1,000 square feet in a spray tank, with application every two to four weeks. That makes the product a fit for users able to measure liquid and manage tank spraying, rather than a spreader-based routine. The 26% soluble potash analysis supplies its potassium focus, while the phosphite formulation is presented as supporting plant defenses during high-stress periods. Protective clothing and avoidance of inhalation are specified.

Skip it if you prefer a granular, spreader-applied lawn fertilizer; The Andersons Professional Potassium Fertilizer offers small-particle granules.

Pendelton suits lawn managers who can mix measured liquid in a spray tank and follow a recurring foliar schedule. It offers a specific turf rate and stress-support positioning, but does not fit buyers avoiding repeated spray applications.

Listed on Amazon as: 0-0-26 Foliar Phosphite (26% Soluble Potash) Liquid Fertilizer (32 oz.)

#5

5. Supply Solutions Pro-Mag Trio

• Form: Powder
• Weight: 25 lb

Best for: Multi-nutrient turf feeding.

Why it ranks #5: The 0-0-22 formula is designed for lawns and turf and adds magnesium and sulfur, making it a multi-nutrient option rather than potassium alone.

Potassium, magnesium, and sulfur arrive together in Supply Solutions 0-0-22 Pro-Mag Trio, giving lawn owners a multi-nutrient powder rather than potassium alone. The water-soluble formula is listed for lawns and turf as well as palms and fruit trees, supporting use across varied plantings.

The three-nutrient blend connects potassium with stress tolerance, magnesium with foliage support, and sulfur as part of the formula, so it suits buyers seeking more than a single-potash input. Its water solubility supports mixing for application, while the powder form is intended for steady feeding through the growing season. The listing also names palms and fruit trees, making it useful for a property with both turf and other plantings. No lawn-specific application rate is supplied in the provided facts.

Skip it if you need a stated turf rate or a potassium-only formula; Pendelton Turf Supply 0-0-26 lists a lawn dosage.

Pro-Mag Trio fits lawn owners who want potassium alongside magnesium and sulfur, especially on properties with turf, palms, or fruit trees. Its water-soluble powder supports mixed-use feeding, but buyers must obtain application guidance beyond the supplied details.

Listed on Amazon as: Supply Solutions | 0-0-22 Pro-Mag Trio – High Potassium, Magnesium & Sulfur Fertilizer for Lawns, Turf, Palm & Fruit Trees – Water-Soluble Plant Food for Stronger Growth & Higher Yields (10 Pound)

#6

6. CountryMax Potash Fertilizer

• Form: Granules

Best for: Mixed lawn and garden use.

Why it ranks #6: This granular potash is listed for lawns as well as gardens, but the supplied directions say to apply it to soil around plants.

A concentrated granular potash formula supplies potassium for lawns, garden soil, and crops, giving buyers one fertilizer for several outdoor plantings. CountryMax also describes benefits for root strength, water regulation, and plant structure, so the product suits people managing mixed beds and turf rather than a lawn-only program.

Because this fertilizer comes as granules and directs users to apply it to soil around plants, it fits soil-based application rather than a hose-end spray routine. The listed uses span lawns, fruits, vegetables, flowers, trees, and outdoor plants, which can simplify product selection for a mixed garden. Its potassium focus is connected in the listing to root strength and water regulation; no specific lawn coverage or application rate is provided in the supplied facts.

Skip it if you need a stated lawn coverage figure or a hose-applied liquid; Simple Lawn Solutions 0-0-25 offers hose-end spraying.

CountryMax fits gardeners who want granular potassium fertilizer for turf alongside vegetables, fruit, flowers, or trees. Choose it for soil application around varied plantings; buyers who need an explicit lawn spread rate should look elsewhere.

Listed on Amazon as: CountryMax 10LB Potash Fertilizer for Lawn & Garden Plants

#7

7. Cz Garden Muriate of Potash

• Form: Granules
• Weight: 0.1 milligrams

Best for: High-potash garden and lawn use.

Why it ranks #7: The 0-0-60 granules list green lawns among many uses, but the product is broadly garden-oriented and does not give a lawn coverage rate.

A 0-0-60 muriate of potash concentrate delivers a high-potassium granular option for both green lawns and diverse garden plantings. Cz Garden Supply also lists flowers, fruit and vegetable gardens, herbs, and trees, making this a broad-use choice for buyers managing turf alongside other plants.

The granules are described as water soluble and easy to pour from a resealable container, making storage and measuring more convenient between applications. Its high potassium concentration is linked to carbohydrate metabolism and protein synthesis, with the listing citing flower and fruit density as intended benefits. Lawn use is included among the permitted settings, but the supplied directions simply say to pour the necessary quantity, so buyers should follow the product's handling precautions and their application plan.

Skip it if you cannot use protective gloves and eyewear while handling granular fertilizer; CFUTABOH Sulphate of Potash is another listed potassium option.

Cz Garden Supply suits buyers applying high-potash fertilizer across lawn and garden areas, including flowers, fruit, and vegetables. Its resealable container aids storage, but safe handling requires gloves and eyewear, and the supplied directions give no specific rate.

Listed on Amazon as: Muriate of Potash 0-0-60 Fertilizer Made in USA – MOP Potassium Plant Food for Indoor/Outdoor Plants, Flower Gardens, Fruit and Vegetable Gardens, Holistic Herbs, Trees and Green Lawns!

#8

8. CFUTABOH Sulphate of Potash

• Form: Fine Crystals
• Weight: 8 oz

Best for: Chloride-free potassium crystals.

Why it ranks #8: This chloride-free 0-0-50 fine crystal product can be used on lawns, but its listing focuses on general garden and plant applications.

Refined 0-0-50 sulphate of potash supplies concentrated potassium without chloride, giving CFUTABOH a clear option for lawns and broader garden use. Its fine-crystal form suits buyers who want a potassium-focused product for beds, pots, lawns, or greenhouses rather than a multi-nutrient fertilizer.

The sulphate of potash formulation provides potassium only, according to the product information, and is described as chloride-free. That may fit plantings where the buyer wants to avoid chloride while supporting cell walls and drought or frost tolerance. Fine crystals are listed as the product form, and the stated uses span lawns, beds, pots, and greenhouses. The supplied facts do not give a lawn application rate or coverage figure, so planning the amount requires additional product guidance.

Skip it if you need stated lawn coverage or spreader settings; The Andersons Professional Potassium Fertilizer lists coverage and spreader guidance.

CFUTABOH suits buyers seeking chloride-free, potassium-focused crystals for lawn and garden use. Its stated range includes beds, pots, and greenhouses as well as lawns, but the supplied facts leave lawn rate and coverage planning unresolved.

Listed on Amazon as: High Potassium Fertiliser 0-0-50 Sulphate of Potash, Potash Fertiliser for Garden & All Plants (1 LB)

#9

9. Supply Solutions Muriate of Potash

• Form: Granules
• Weight: 5.1 lb

Best for: Bulk potash for soil-tested lawns.

Why it ranks #9: The 0-0-60 granular formula is positioned chiefly for crops, blooms, and garden plants; lawn use is mentioned with soil testing advice.

A 0-0-60 muriate of potash formula gives this granular Supply Solutions fertilizer a concentrated potassium focus for soil-based plant care. Its supplied guidance specifically connects lawn use with soil testing and cautions against over-fertilization, making it relevant to buyers who base potash applications on soil results.

The granular form supports soil application, while the listed 0-0-60 analysis supplies a high-potassium product for lawns, gardens, crops, blooms, and acidic plants. The additional guidance recommends applying muriate of potash according to soil test results and using a minimal amount to avoid excess application. That makes testing and measured use central to the lawn-care workflow. The product is presented for foliage, flower, fruit, and vegetable support as well as lawn use.

Skip it if you want a lawn product with a stated coverage area and spreader settings; The Andersons Professional Potassium Fertilizer lists both.

This Supply Solutions potash fits buyers managing lawns and gardens who can consult soil-test results before applying granular fertilizer. Its concentrated formula calls for careful, restrained use; choose another option if you need listed lawn coverage or spreader guidance.

Listed on Amazon as: Supply Solutions Muriate of Potash 0-0-60 Fertilizer, High Potassium Fertilizer, Potassium for Plants, Ideal Plant Food & Potash for Garden – for Lush Crops, Blooms, Acidic Plants (50lbs)

#10

10. Greenway Potassium Chloride

• Form: Powder
• Weight: 3 lb

Best for: Water-soluble soil or hydroponic use.

Why it ranks #10: This 0-0-62 soluble powder emphasizes soil and hydroponic use rather than lawn care, making it the least directly matched option.

A 100% water-soluble 0-0-62 potassium chloride powder supports both soil and hydroponic growing, setting Greenway Biotech apart for buyers using more than conventional lawn soil. The product links potassium to root development and nutrient transport, making it a concentrated option for plant nutrition.

The water-soluble powder can be used in soil or hydroponics according to the product description, giving growers flexibility across cultivation methods. Its 0-0-62 analysis supplies concentrated potassium, which the listing connects to root development and the movement of water, nutrients, and carbohydrates within plants. That combination suits users seeking potassium support beyond a lawn-only product. The supplied facts do not specify a lawn rate, so turf application planning needs product-specific directions.

Skip it if you need chloride-free turf nutrition; FIVE STAR TURF 0-0-25 is listed as chloride-free and for lawns.

Greenway Biotech fits growers who want water-soluble potassium for soil or hydroponic use and value its listed root-support role. For lawns, account for the potassium chloride formulation and seek turf-specific application directions.

Listed on Amazon as: Greenway Biotech, Inc. Potassium Chloride 0-0-62 Fertilizer – Muriate of Potash | 100% Water Soluble – Improves Plant's Root Growth Fertilizers Ideal for Soil and Hydroponics – 3 Pounds