Grow Organic Langbeinite Fertilizer
Best mineral-based supplement for gardeners needing balanced potassium, magnesium, and sulfur.
This mineral-based powerhouse delivers potassium, magnesium, and sulfur in a single, uniform particle that won't disrupt your soil's pH. It trades the instant gratification of quick-release fertilizers for a slower, steady nutrient feed that is far safer for sensitive roots.
$16.99
at
SeedTime (retailer)
Who it's for
- Gardeners seeking balanced mineral support for high-quality fruit production
- Container gardeners growing sensitive plants prone to fertilizer burn
- Organic growers needing certified inputs for sustainable soil health
Who should skip it
- Gardeners wanting an all-in-one fertilizer for complete plant nutrition
- Budget-conscious growers prioritizing low-cost conventional potassium sources
- Farmers requiring immediate nutrient availability for rapid growth cycles
Performance breakdown
Nutrient Density
Delivers a potent, balanced trio of essential secondary plant nutrients.
Soil Safety
Neutral pH and low chloride content protect delicate root systems.
Application Versatility
Performs reliably in both large field plots and small containers.
Release Consistency
Slow-release granular form ensures steady, long-term nutrient availability for plants.
Ease of Distribution
Uniform particle size allows for precise and even soil coverage.
Mineral Purity
High-quality mineral source provides clean, reliable nutrition for organic gardening.
Key Specs
Guaranteed analysis
Soluble potash–22%; Sulfur–22%; Magnesium–10.8%
Weight
5 lb
pH
Neutral
Derived from
sulfate of potash-magnesia
Maximum chlorine content
less than 3.0%
Application rate for containers
1 Tablespoon per gallon of soil
Fertilizer Source
Mineral Based
Nitrogen Percentage
0.0%
Phosphorus Percentage
0.0%
Potassium Percentage
22.0%
Know before you buy
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Ask Metto anything about the Grow Organic Langbeinite Fertilizer before you decide.
