Collection: Potassium Fertilizers
Compare products by nutrient analysis, formulation, application method and label directions.
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Citrus & Fruit Tree Food 7-3-3 (4 lb bag)
Regular price $11.99Sale $11.99Unit price per -
Acid Mix 4-3-6 (5 lb Box)
Regular price $15.99Sale $15.99Unit price per -
Tomato & Vegetable Food 4-5-3 (4 lb bag)
Regular price $11.99Sale $11.99Unit price per -
Peaceful Valley Organic Liquid Kelp
Regular price $8.99Sale $8.99Unit price per -
Acid Mix (25 lb Bag)
Regular price $48.99Sale $48.99Unit price per -
Langbeinite 0-0-22 Fertilizer (5 lb box)
Regular price $16.99Sale $16.99Unit price per -
Citrus Mix Fertilizer 6-3-3 (5 lb)
Regular price $17.99Sale $17.99Unit price per -
Tomato & Vegetable Food 4-5-3 (15 lb bag)
Regular price $36.99Sale $36.99Unit price per -
Ultra Bloom 0-10-10 (4 lb bag)
Regular price $11.99Sale $11.99Unit price per -
Acid Mix 4-3-6 (1 lb Box)
Regular price $4.99Sale $4.99Unit price per -
Rose, Flower & Bulb Mix 4-8-4 (5 lb Box)
Regular price $17.99Sale $17.99Unit price per -
Sulfate of Potash Ultrafines - Diamond K Soluble 0-0-50 (50 lb)
Regular price $49.99Sale $49.99Unit price per -
Fruit Tree Fertilizer 6-2-4 (5 lb box)
Regular price $17.99Sale $17.99Unit price per -
Vegetable Garden Fertilizer 4-4-4 (25 lb)
Regular price $47.99Sale $47.99Unit price per -
Citrus and Avocado Fertilizer (50 lb)
Regular price $57.99Sale $57.99Unit price per -
Vegetable Garden Fertilizer 4-4-4 (5 lb box)
Regular price $15.99Sale $15.99Unit price per -
Citrus Mix Fertilizer 6-3-3 (1 lb box)
Regular price $5.99Sale $5.99Unit price per -
Rose and Flower Mix 4-8-4 (25 lb Bag)
Regular price $53.99Sale $53.99Unit price per$0.00Regular price -
Citrus Mix Fertilizer 6-3-3 (25 lb Bag)
Regular price $56.99Sale $56.99Unit price per -
Rose, Flower & Bulb Mix 4-8-4 (1 lb Box)
Regular price $5.99Sale $5.99Unit price per -
AgroThrive Organic General Purpose Fertilizer (1 gal)
Regular price $35.99Sale $35.99Unit price per -
All Purpose Plant Food 5-5-5
Regular price $12.99Sale $12.99Unit price per -
True Organic Liquid All-Purpose Plant Food 16 oz
Regular price $8.99Sale $8.99Unit price per -
Hill & Valley Fertilizer Mix Plus N 2.0-4.0-4.0 (40 lb)
Regular price $51.99Sale $51.99Unit price per -
Espoma Organic Garden-tone (4 lb)
Regular price $12.00Sale $12.00Unit price per -
Maxicrop Kelp Extract
Regular price $24.99Sale $24.99Unit price per -
Tomato & Veg Fertilizer 2-4-2
Regular price $32.99Sale $32.99Unit price per -
Epsom Salts (50 lb)
Regular price $59.99Sale $59.99Unit price per -
Espoma Organic Plant-Tone (4 lb)
Regular price $12.00Sale $12.00Unit price per -
Recipe 420 UltraBloom 2-8-8 (4 lb bag)
Regular price $21.99Sale $21.99Unit price per -
AgroThrive General Purpose Fertilizer (5 gal)
Regular price $89.99Sale $89.99Unit price per -
Rose & Flowering Fertilizer 2-6-4
Regular price $32.99Sale $32.99Unit price per
Collection: Boost Plant Health with High Potassium Fertilizer
Potassium Fertilizers for Plant Vigor
Compare potassium sources used to support flowering, fruit development, water regulation and overall plant function. This collection includes individual amendments and blended fertilizers with varying potassium analyses.
Choosing and Applying
Base applications on soil conditions and crop needs. Review the guaranteed analysis, chloride content where relevant, application rate and label directions.
Browse all nutrient-specific fertilizers or compare phosphorus and calcium fertilizers.