Protassium+ Organic SOP 0-0-50 Standard Fines 50lb.
Best organic potassium source for hydroponic and drip irrigation systems.
Elevate your organic gardening with Protassium+ Organic SOP 0-0-50 Standard Fines. This premium potassium sulfate fertilizer is OMRI certified, ensuring suitability for organic production systems. Its fine screening allows for rapid dissolution, making it ideal for liquid solutions in hydroponics, fertigation, and drip irrigation. Naturally produced through a sustainable solar evaporation process, it's free from animal waste and harmful byproducts. This fertilizer provides a high analysis of 50% soluble potash and 18% sulfur, crucial for boosting crop quality and yield in your vegetable gardens and beyond.
$65.60
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4448
#50 in Fertilizers
Price vs Category Average
+6%
Above average
Guaranteed Analysis
0050
/ --
Who it's for
- Organic farmers needing OMRI-certified potassium sources
- Gardeners seeking improved plant vigor and fruit quality
- Growers protecting salt-sensitive crops from fertilizer burn
Who should skip it
- Budget-conscious farmers managing large-scale acreage
- Applicators wanting to avoid dust and uneven spreading
- Gardeners looking for an all-in-one NPK solution
Performance breakdown
Solubility Efficiency
Fine screening ensures rapid, clog-free dissolution for precise fertigation systems.
Organic Integrity
OMRI certification guarantees compliance with the strictest organic production standards.
Nutrient Density
High-potash formula delivers a potent boost for superior crop quality.
Purity Profile
Minimal chloride and heavy metal content protects sensitive root systems.
Application Versatility
Adapts seamlessly from traditional broadcast methods to modern hydroponic setups.
Sustainability Impact
Solar evaporation production minimizes the environmental footprint of mineral extraction.
Key Specs
Guaranteed Analysis
0-0-50
Soluble Potash (K2O)
50% Minimum
Sulfur (S)
17% Minimum (18% Guaranteed)
Chloride (Cl) Max
0.8%
Derived From
Potassium Sulfate
Package Weight
50 lb.
Production Method
Solar evaporation process
Fertilizer Source
Organic, Mineral Based
Features
- OMRI Listed for organic gardening.
- Dissolves quickly for liquid applications.
- Ideal for hydroponics and drip systems.
- Sustainably produced with solar evaporation.
- Low in chloride, sodium, and heavy metals.
- Trusted for organic farming over 30 years.
- Provides essential potassium and sulfur.
What customers say
Customers consistently praise the exceptional quality and effectiveness of this organic sulfate of potash. Gardeners and farmers appreciate the high potassium content (0 0 50) which delivers visible improvements in crop health, yield, and stress resistance, especially in organic growing environments. The standard fines formulation is generally easy to apply, though some users note the need for careful spreading due to the fine particle size. Overall, the product is viewed as a premium, high value investment that justifies its cost through superior results and reliable organic certification.
Know before you buy
Yes, this product is OMRI Listed, meaning it meets the standards required for use in organic production systems.
Absolutely. The fine screening of these granules allows them to dissolve quickly and completely, making them well-suited for liquid applications like fertigation and hydroponics.
This product is specifically formulated to be low in chloride, with a maximum level of 0.8%. This makes it a safer choice for chloride-sensitive crops compared to standard potassium fertilizers like muriate of potash.
Protassium+ provides 50% soluble potash (K2O) and 18% sulfur. These nutrients are essential for improving overall crop quality, plant vigor, and yield.
It is produced through a sustainable solar evaporation process. This method relies on natural elements rather than animal waste or synthetic byproducts.
This is a quick-release fertilizer. Because it is highly water-soluble, it provides nutrients to your plants rapidly, which is ideal for correcting deficiencies or supporting high-demand growth phases.
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