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Potassium contributes strongly to overall plant health by regulating internal processes. Potassium deficiencies lead to weak stalks and immature roots, leaving the plant susceptible to insects. Since potassium makes up part of the fluid of the plant, it is found throughout plant tissue, meaning plants need a strong source of potassium as they grow.





Rich in readily available nitrogen, phosphorus and micronutrients and nearly the third of the nitrogen is water soluble, making it readily available to plants. A fertilizer for both early and mid-season booster applications and is the undisputed champion of all-natural fertilizers.

Able to absorb up to one-third its weight in water to improve the moisture holding capacity of garden soils and potting mixes.

A quintessential, traditional organic fertilizer that promotes strong root development and enhances early season growth and helps plants take to new soil by boosting root development.

Listed by the organic Materials Review Institute OMRI for use in organic production. Designed for efficient delivery and immediate uptake, this 200 mesh powder can be used in reservoirs, fertigation, drip irrigation or spray applications.

1. Down To Earth All Natural Fertilizers
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Down to Earth Organic Langbeinite Fertilizer Mix 0-0-22, 5 lb
#adDown To Earth All Natural Fertilizers #ad - Its maximum chlorine content is less than 3. 0 percent, minimizing the potential for fertilizer “burn, ” and its neutral pH does not alter soil activity.Potassium contributes strongly to overall plant health by regulating internal processes. Potassium deficiencies lead to weak stalks and immature roots, leaving the plant susceptible to insects. Since potassium makes up part of the fluid of the plant, it is found throughout plant tissue, meaning plants need a strong source of potassium as they grow.
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Keep it real, keep it lightrail; Solidly made in the USA since 1986. Down to earth langbeinite 0-0-22 is a naturally mined crystalline mineral that supplies the water-soluble sulfate form of three vital plant nutrients: potassium, magnesium and sulfurs.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down to Earth #ad |
Height | 10.8 Inches |
Length | 3.5 Inches |
Weight | 5.25 Pounds |
Width | 8 Inches |
Part Number | 07852 |
Model | 07852 |
More information #ad
2. PowerGrow Systems
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LANGBEINITE, Sulfate of Potash Magnesia K-MAG Organic Fertilizer 0-0-22 5 pounds
#adPowerGrow Systems #ad - Langbeinite is an excellent source of readily available sulfur, potassium and magnesium. Langbeinite is easy on plants and will not burn plants when used as a fertilizer.More information #ad
Langbeinite sulfate of Potash Magensia or K-MAG in bulk. Langbeinite is available in 5lb, 10lb, and 20lb quantities. Langbeinite fertilizer has an NPK of 0-0-22.Brand | PowerGrow Systems #ad |
Manufacturer | PowerGrow Systems #ad |
Weight | 5 Pounds |
More information #ad
3. Down To Earth All Natural Fertilizers
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Down to Earth OMRI Organic Solution Grade Langbeinite 0-0-21.5, 1 lb
#adDown To Earth All Natural Fertilizers #ad - Contains potassium k, magnesium mg and sulfur S – three of the essential nutrients that plants require to achieve optimum growth and reach their maximum potential. Designed for efficient delivery and immediate uptake, this 200 mesh powder can be used in reservoirs, fertigation, drip irrigation or spray applications.More information #ad
In a balanced ratio and in the highly available water-soluble sulfate form, we offer a high performance solution grade powder that growers can apply with confidence. Listed by the organic Materials Review Institute OMRI for use in organic production.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down To Earth All Natural Fertilizers #ad |
Weight | 1 Pounds |
Part Number | DTE-FERT-SOLU-Langbeinite-1lb |
More information #ad
4. The Seed Supply
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KMS Potassium Magnesium Sulfate 0-0-21.5, Sul-Po-Mag, Organic Solution Grade Fertilizer Powder 1 Bag
#adThe Seed Supply #ad - Solution grade ultra Fine 200 Mesh Powder. 0-0-21. 5 potassium Magnesium Sulfate. Shipped via USPS. Safe and effective for most liquid applications such as micro-jet, drip, foliar, hydroponics and greenhouse. Supplies water Soluble Magnesium, Sulfur, and Potassium.More information #ad
Brand | The Seed Supply #ad |
Manufacturer | Diamond K Gypsum, Inc #ad |
Weight | 50 Pounds |
Part Number | KMS50 |
More information #ad
5. Incredible Bulk
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Bloom Booster, Incredible Bulk 0.1-10-25 Certified Vegan OMRI Listed Organic Plant Food 1lb
#adIncredible Bulk #ad - This 1lb bag is intended for smaller gardens. This size provides up to 130 gallons of solution. Organic, made in usa. The incredible bulk is the highest quality bloom booster on the market.More information #ad
Incredible bulk is an organic bloom booster derived from organic materials that were designed to increase yield, smell, and color.Brand | Incredible Bulk #ad |
Manufacturer | Growganica Inc #ad |
Height | 2.5 Inches |
Length | 5 Inches |
Weight | 1 Pounds |
Width | 8 Inches |
More information #ad
6. Down To Earth All Natural Fertilizers
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2 lb, Down to Earth Organic Bat Guano Fertilizer Mix 7-3-1
#adDown To Earth All Natural Fertilizers #ad - Down to earth bat guano mix is an fertilizer with 7-3-1 formula and is listed by the Organic Materials Review Institute OMRI for use in organic production.Rich in readily available nitrogen, phosphorus and micronutrients and nearly the third of the nitrogen is water soluble, making it readily available to plants. A fertilizer for both early and mid-season booster applications and is the undisputed champion of all-natural fertilizers.
More information #ad
Fast acting and efficient when mixed into potting mediums, applied as a side dress or steeped to make a potent guano tea or foliar spray. Provides essential plant nutrition for vigorous vegetative growth and early fruit and flower development.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down to Earth #ad |
Height | 0.75 Inches |
Length | 16.25 Inches |
Weight | 0.3 Pounds |
Width | 7.25 Inches |
Part Number | 723640 |
Model | HGC723640 |
More information #ad
7. Down To Earth All Natural Fertilizers
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Down to Earth Organic Greensand Fertilizer, 5 lb
#adDown To Earth All Natural Fertilizers #ad - Traditionally used to loosen heavy clay soil or to hold together loose sandy soils and is Registered Organic Input Material CDFA. Down to earth greensand is a five pound box of all natural fertilizer and is listed by the Organic Materials Review Institute OMRI for use in organic production.Able to absorb up to one-third its weight in water to improve the moisture holding capacity of garden soils and potting mixes.
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Naturally occurring in marine sedimentary deposits and is composed primarily of the blue-green siliceous mineral glauconite. Highly recommended as a soil amendment for vegetables, lawns, fruits, herbs, ornamentals and all types of trees and shrubs since the 1700s for its unique physical properties.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down To Earth All Natural Fertilizers #ad |
Weight | 5 Pounds |
More information #ad
8. Down To Earth All Natural Fertilizers
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Down to Earth Organic Bone Meal Fertilizer 3-15-0, 5 lb
#adDown To Earth All Natural Fertilizers #ad - As one of the three big nutrients for plants, phosphorous plays a role in both root and bloom development, which helps produce premium fruit and flowers. A source of readily available phosphorous and calcium for flowering plants, trees and ornamentals and is also recognized as the ideal organic fertilizer when planting bulbs.A quintessential, traditional organic fertilizer that promotes strong root development and enhances early season growth and helps plants take to new soil by boosting root development.
More information #ad
Down to earth bone meal is a five pound box of fertilizer with 3-15-0 formula and is listed by the Organic Materials Review Institute OMRI for use in organic production. Strong root development means plants will grow faster and be healthier because they can absorb more water and nutrients from the soil.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down To Earth All Natural Fertilizers #ad |
Height | 10.8 Inches |
Length | 8 Inches |
Weight | 5 Pounds |
Width | 3.5 Inches |
Part Number | 723695 |
Model | 723667 |
More information #ad
9. Down To Earth All Natural Fertilizers
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Down to Earth OMRI Organic Solution Grade Potassium Sulfate 0-0-50, 1 lb
#adDown To Earth All Natural Fertilizers #ad - Contains potassium k and sulfur S – Two of the essential nutrients that plants require to achieve optimum growth and reach their maximum potential.Listed by the organic Materials Review Institute OMRI for use in organic production. Designed for efficient delivery and immediate uptake, this 200 mesh powder can be used in reservoirs, fertigation, drip irrigation or spray applications.
More information #ad
In a balanced ratio and in the highly available water-soluble sulfate form, we offer a high performance solution grade powder that growers can apply with confidence. Performing a complete soil or plant tissue analysis or using a home soil test kit before application is recommended.Brand | Down To Earth All Natural Fertilizers #ad |
Manufacturer | Down To Earth All Natural Fertilizers #ad |
Weight | 1 Pounds |
Part Number | DTE-FERT-SOLU-Potassium-1lb-FOS |
More information #ad
10. The Andersons
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The Andersons Professional PGF Complete 16-4-8 Fertilizer with Humic DG 10,000 sq.ft.
#adThe Andersons #ad - Lower nitrogen strength allows you to apply more particles per square foot. Slow release and feeds for up to 8 weeks. Super fine particles which give you TWICE the number of particles per square foot.More information #ad
More particles, better and more even distribution. Humic dg humic and fulvic acid which helps enrich your soil and allows plants to process nutrients better. Not sold in California and South Dakota.Brand | The Andersons #ad |
Manufacturer | The Andersons #ad |
Part Number | Ande7 |
More information #ad