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Items 1-16 of 25
  1. Potassium Sulfate Fertilizer 0-0-53
    Potassium Sulfate Fertilizer 0-0-53 is a solution-grade, 100% water-soluble potassium fertilizer (K₂SO₄) that delivers 53% soluble potash (K₂O) and 17% sulfur in a single crystalline form. It is one of the most concentrated chloride-free potassium sources available. Potassium regulates water movement, enzyme activity, and sugar transport into developing fruit, supporting fruit size,...
    From $ 21.99
  2. Potassium Chloride (Muriate of Potash) 0-0-62
    Potassium Chloride Fertilizer 0-0-62, also known as muriate of potash (MOP), is one of the most concentrated and widely used dry potassium fertilizers in agriculture. At 62% soluble potash (K₂O), it is 100% water-soluble and delivers a high amount of potassium per pound, with no nitrogen or phosphorus. Potassium activates dozens...
    From $ 19.99
  3. Monopotassium Phosphate 0-52-34
    Monopotassium Phosphate (MKP) 0-52-34 is a nitrogen-free, 100% water-soluble P-K fertilizer — a single technical-grade crystal (potassium dihydrogen phosphate) supplying 52% available phosphate (P₂O₅) and 34% soluble potash (K₂O) with no nitrogen and no fillers. The zero-nitrogen profile is what defines MKP: at flowering and fruit set it delivers concentrated phosphorus and...
    From $ 29.99
  4. Organic Alfalfa Meal Fertilizer 2.5-0-2.5
    Greenway Biotech Organic Alfalfa Meal 2.5-0-2.5 is a ground, plant-derived fertilizer for garden beds, rose beds, and soil preparation. It supplies nitrogen and potassium while adding organic matter to the soil. 2.5% total nitrogen: water-insoluble nitrogen from alfalfa meal, gradually made available through microbial activity. 2.5% soluble potash: potassium expressed as...
    From $ 21.99
  5. Azalea & Camellia Fertilizer 15-5-15
    Azalea & Camellia Fertilizer 15-5-15 is a completely water-soluble, chloride-free fertilizer formulated for azaleas, camellias, rhododendrons, gardenias, blueberries, and other acid-loving plants. Its balanced 10-5-10 NPK delivers nitrogen and potash for season-long maintenance feeding, with modest available phosphate suited to established plants. The formula supplies iron as a DTPA chelate, which stays...
    From $ 24.99
  6. Cucumber Fertilizer 8-16-36 | Chelated Micronutrients | Hydroponics, Soil & Foliar Application
    Greenway Biotech Cucumber Fertilizer 8-16-36 is a water-soluble fertilizer for cucumbers, squash, pumpkins, gourds, watermelon, cantaloupe, and the other cucurbits named on its label. It guarantees 8% nitrogen (6.5% nitrate, 1.5% ammoniacal), 16% available phosphate (P₂O₅), and 36% soluble potash (K₂O), with EDTA-chelated iron, manganese, zinc, and copper plus boron and...
    From $ 24.99
  7. Lettuce Fertilizer 8-15-36 | Chelated Micronutrients | Hydroponics, Soil & Foliar Application
    <p>Greenway Biotech Lettuce Fertilizer 8-15-36 is a water-soluble fertilizer for lettuce, kale, spinach, cabbage, broccoli, bok choy, chard, and the other leafy crops named on its label. It guarantees 8% nitrogen (7.5% nitrate, 0.5% ammoniacal), 15% available phosphate (P₂O₅), and 36% soluble potash (K₂O), with EDTA-chelated iron, manganese, zinc, and copper...
    From $ 24.99
  8. Pepper and Herb Fertilizer 11-11-40 | Chelated Micronutrients | Hydroponics, Soil & Foliar Application
    Greenway’s Pepper & Herb Fertilizer 11-11-40 is a water-soluble fertilizer for peppers and the culinary herbs on its label, such as basil, parsley, cilantro, and rosemary. It guarantees 11% nitrogen (10.5% nitrate, 0.5% ammoniacal), 11% available phosphate (P₂O₅), and 40% soluble potash (K₂O), with EDTA-chelated iron, manganese, zinc, and copper plus...
    From $ 24.99
  9. Blossom Green Fertilizer 2-6-8
    Blossom Green 2-6-8 is a dry, 100% water-soluble hydroponic bloom fertilizer formulated for the flowering and fruiting stage. Its 2-6-8 NPK keeps nitrogen at a maintenance level while loading available phosphate (P₂O₅) and soluble potash (K₂O) — the two nutrients flowering plants demand most. Phosphorus supports bud initiation, flower density, and energy...
    From $ 24.99
  10. Sulfate of Potash Magnesia 0-0-22
    K-Mag Fertilizer 0-0-22 (sulfate of potash magnesia, also called langbeinite) is a naturally mined mineral fertilizer that delivers three nutrients in a single soil-applied product: 22% soluble potash (K₂O), 11% magnesium, and 22% sulfur, with less than 2.5% chloride and no nitrogen. Potassium supports fruit size, sugar movement, and stress tolerance; magnesium...
    From $ 17.99
  11. Organic Azomite Powder Fertilizer 0-0-0.2 (Micronized)
    Organic Azomite 0-0-0.2 Micronized is an OMRI Listed natural mineral soil amendment mined from a single hydrated sodium calcium aluminosilicate (HSCAS) deposit in central Utah — volcanic ash that settled into a mineral-rich seabed roughly 30 million years ago. One product supplies approximately 70 trace and ultra-trace elements, including silica, calcium, magnesium,...
    From $ 19.99
  12. Strawberry Fertilizer 8-12-32 | Chelated Micronutrients | Hydroponics, Soil & Foliar Application
    Greenway Biotech Strawberry Fertilizer 8-12-32 is a water-soluble fertilizer for strawberries, raspberries, blackberries, and the other berries and fruit trees on its label. It guarantees 8% nitrogen (7.2% nitrate, 0.8% ammoniacal), 12% available phosphate (P₂O₅), and 32% soluble potash (K₂O), with EDTA-chelated iron, manganese, zinc, and copper plus boron and molybdenum....
    From $ 24.99
  13. Sale
    Specialty Fertilizer and Cal Mag Plus (Small)
    This is our small bundle of one of our specialty fertilizers and Cal Mag Plus 2-0-0 Concentrate. Includes: - One 2-pound bag of a specialty fertilizer of your choice and one 2.5-pound bag of Cal Mag Plus 2-0-0 Concentrate. Choose from the following specialty fertilizers: - Lettuce 8-15-36 Fertilizer - Cucumber 8-16-36 Fertilizer - Tomato...
    $ 64.99 $ 72.98
  14. Organic Elemental Sulfur Powder
    Organic Elemental Sulfur Powder is a CDFA-registered, finely milled elemental sulfur (≥98% S) for lowering soil pH and supplying sulfur as a plant nutrient. The fine particle size gives soil bacteria more surface area to colonize, which speeds the conversion to plant-available sulfate. Elemental sulfur is not directly acidic — soil bacteria...
    From $ 21.99
  15. Sale
    Specialty Fertilizers + Calcium Nitrate + Epsom Salt
    This is our bundle of one of our specialty fertilizers, Calcium Nitrate and Epsom Salt. Includes: - One 2-pound bag of a specialty fertilizer of your choice, one 2-pound bag of Calcium Nitrate 15.5-0-0 and one 1-pound bag of Epsom salt. Choose from the following specialty fertilizers: - Lettuce 8-15-36 Fertilizer - Cucumber 8-16-36...
    $ 66.99 $ 76.97