Sulfate of potash (SOP) 0-0-50 is a potassium-rich fertilizer designed to boost plant vigor, flowering, and overall resilience. This article reviews five top granular SOP products available on Amazon, highlighting their key features, ideal uses, and compatibility with common garden and landscape scenarios. Each product section includes direct access via a clickable link, an image, and essential usage notes to help you choose the right fertilizer for your outdoor or indoor garden needs.
Summary of chosen products:
| Product | Brand | Key Benefit | Package Size |
|---|---|---|---|
| Southern Ag Sulfate of Potash 0-0-50 | Root 98 Warehouse | Strengthens turfgrass and ornamentals; soil-ready potassium source | 5 lb |
| Sulfate of Potash 0-0-50 Granular Fertilizer | Dibbs Farms | Corrects potassium deficiency in diverse crops | 50 lb |
| Supply Solutions | 0-0-50 Plus 17% Sulfur | Golden K-Max | Supply Solutions | Balanced nutrition with magnesium micro-nutrients and sulfur | 40 lb |
| Sulfate of Potash 0-0-50 Granular Fertilizer | Dibbs Farms | Strengthens plants against disease and stress | 10 lb |
| Supply Solutions | 0-0-50 Plus 17% Sulfur | Golden K-Max SOP | Supply Solutions | Comprehensive 17-18-18 style nutrition for varied plantings | 25 lb |
Note: This guide focuses on SOP 0-0-50 products and does not include price details. Always follow label directions for application rates and seasonal timing to avoid over-fertilization and nutrient runoff.
Southern Ag Sulfate Of Potash 0-0-50
Brand: Root 98 Warehouse
Features: Strengthens turfgrass and ornamental plants, making them less susceptible to disease & adverse conditions such as winter. Corrects potassium deficiency in turfgrass, woody ornamental plants, vegetable plants, and flowers. Contains granular grade potassium sulfate. Not for spraying.
Sulfate Of Potash 0-0-50 Granular Fertilizer (50 Lbs.)
Brand: Dibbs Farms
Features: Strengthens the plant making it less susceptible to disease and adverse conditions. Corrects potassium deficiency in avocado, beans, corn, cherries, citrus, grapes, palms, and roses. Suitable for vegetables, flowers, shrubs, and lawns.
Supply Solutions | 0-0-50 Plus 17% Sulfur | Golden K-Max SOP
Brand: Supply Solutions
Features: Complete nutrition in one scoop: 17-18-18 fertilizer with equal NPK plus micros (boron, manganese, zinc) and humic acid support. Ideal for lawns, gardens, containers, and a variety of landscape plants. Powder formula for easy handling; apply by broadcasting on soil and water in after-application.
Sulfate Of Potash 0-0-50 Granular Fertilizer (10 Lbs.)
Brand: Dibbs Farms
Features: Strengthens the plant making it less susceptible to disease and adverse conditions. Corrects potassium deficiency in avocado, beans, corn, cherries, citrus, grapes, palms, and roses. Uses: Vegetables, flowers, shrubs, and lawns.
Supply Solutions Sulfate Of Potash 0-0-50 Plant Fertilizer
Brand: Supply Solutions
Features: Ultra-fine and highly soluble for rapid absorption. Boosts blooms and crop yields; great for lawns and gardens. Suitable for indoor plants, outdoor flowers, and general plant care. Water-soluble delivery allows efficient uptake and flexible application.
Organic Sulfate Of Potash 0-0-50
Brand: Cz Garden Supply
Features: OMRI Listed for organic production; premium, high-purity potassium source that enhances color, texture, and taste. Water-soluble for hydroponics, fertigation, and foliar feeding; suitable for indoor and outdoor use.
Supply Solutions | 0-0-50 Plus 17% Sulfur | Golden K-Max SOP (5 Pounds)
Brand: Supply Solutions
Features: Complete nutrition in one scoop with 17-18-18 ratios, essential micros, and humic acid. Useful for lawns, vegetable beds, flower borders, shrubs, trees. A versatile option for spring and fall feeding; simple powder measurement; water after application to move nutrients to the root zone.
Buying Guide: Key Considerations For Potassium Fertilizers
- Nutrient balance and plant needs: SOP supplies potassium (K) with no nitrogen (N) or phosphorus (P). Choose a product that matches your crop’s potassium demand and current soil conditions. For flowering and fruiting plants, higher potassium often supports stronger blooms and fruit set.
- Soil and plant type considerations: Lawns and turf typically benefit from steady SOP applications. Vegetables, fruit trees, ornamentals, and container plants may require timed feeding aligned with growth stages. Consider soil tests to tailor application rates.
- Sulfur presence: Some SOP products include sulfur (S). Sulfur can support acid-loving plants and certain soil conditions. If your soil already contains adequate sulfur, a non-S SOP may be preferable to avoid over-supplementation.
- Solubility and application method: Water-soluble or quickly dissolving SOP formulations work well for drip irrigation or foliar applications. Granular options are convenient for broadcasting or top-dressing and often require watering in.
- Organic and synthetic options: OMRI-listed organic SOP products are suitable for certified organic operations, but ensure compatibility with your crop plans and regulatory guidelines. Synthetic SOP tends to be more readily absorbed in conventional gardening contexts.
- Safety and storage: Store in a cool, dry place away from children and pets. Keep containers sealed to prevent moisture clumping. Follow label directions for safe handling and disposal of any excess material.
- Environmental considerations: Apply at recommended rates to minimize leaching and runoff. Avoid applications before heavy rainfall and calibrate spreaders for uniform distribution to protect waterways.
- Compatibility with other nutrients: Some SOP products can be used alongside other fertilizers, but timing matters. For optimal results, coordinate with soil amendments and water management strategies to ensure nutrients reach the root zone effectively.
The products reviewed here provide a range of options for users seeking sulfate of potash 0-0-50 granular fertilizers. Whether you’re maintaining a turf lawn, supporting fruit trees, or enriching a flower border, SOP can help improve plant resilience, flowering, and crop yields when used according to label directions and local conditions.