Name: Sulfate of Potash | Diamond K Ultra Fine Potassium Sulfate | RMBA
Brand: Diamond K Gypsum
SKU: DKSOP-3
Price: 12.0 USD
Availability: InStock

Sulfate of Potash Diamond K Ultra Fine Potassium Sulfate Powder

3 lb Bag of Sulfate of Potash Diamond K Ultra Fine Potassium Sulfate

10 lb Bag of Sulfate of Potash Diamond K Ultra Fine Potassium Sulfate

50lb Bag of Sulfate of Potash Diamond K Ultra Fine Potassium Sulfate

Back of 50lb Bag of Sulfate of Potash Diamond K Ultra Fine Potassium Sulfate

Technical Data about Ultra Fine Sulfate of Potash

Diamond K Sulfate of potassium potash OMRI listing documentation

$12.00

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Premium Ultra-Fine Sulfate of Potash (0-0-50)

Diamond K's ultra-fine sulfate of potash delivers 100% pure potassium sulfate in a fast-dissolving formula that's perfect for professional growers and serious gardeners seeking maximum plant performance.

Key Benefits for Your Crops

Enhanced Plant Health: Provides essential potassium for stronger stems, improved disease resistance, and better stress tolerance
Superior Soil Drainage: Improves soil structure and water infiltration for healthier root systems
Increased Yields: Promotes larger, higher-quality fruits and vegetables with better shelf life
Fast Absorption: Ultra-fine particles dissolve quickly for immediate plant uptake
OMRI Listed Organic: Certified for use in organic production systems
Low Chloride: Safe for chloride-sensitive crops like potatoes, tobacco, and berries

Application Guidelines

Application Rate: 1-2 lbs per 1,000 sq ft or follow soil test recommendations
Coverage: This 4 lb bag covers up to 4,000 sq ft
Best Timing: Apply during fruit development, flowering, and stress periods
Mixing: Dissolves completely in water for fertigation systems

Technical Specifications

NPK Analysis: 0-0-50 (50% Potassium, 0% Nitrogen, 0% Phosphorus)
Potassium (K2O): 50% minimum guaranteed
Sulfur (S): 18% minimum for improved protein synthesis
Chloride: Less than 2.5% - safe for sensitive crops
Particle Size: Ultra-fine mesh for rapid dissolution
Source: Natural mined potassium sulfate

Perfect For

Ideal for vegetables, fruits, nuts, field crops, greenhouse production, and hydroponic systems. Works excellently with other products in our natural and organic fertilizer collection and pairs well with our pH management tools for complete nutrient programs.

Trust Diamond K Gypsum's decades of experience in providing premium soil amendments to professional growers nationwide.

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Amount

I just ordered your bag of potash ultra fine.I’m going to put this down in a garden 360 sq feet . How would you recommend me administer it into my soil . In The early spring or fall?. How much would you recommend. I’m growing watermelon starting next spring. Any help would be appreciated. Brett

Thank you for choosing Rocky Mountain BioAg:registered:! We're thrilled to hear you're getting ready to grow watermelon in your garden.
For your 360 sq ft garden, here's how to administer the Diamond K SOP ultra fines:
Timing
Best Seasons: Early spring or fall is ideal. For watermelon, early spring application should work perfectly. But if you can get the potash out in the fall that is optimal!
Application Steps
Soil Test & Interpretation:
Rocky Mountain BioAg:registered: Complete Soil Test
Rocky Mountain BioAg:registered: Soil Test Interpretation
Preparation:
Clear the area of any heavy debris.
General Measurement Without Soil Test:
General application, we recommend using 1-2 pounds of potash ultra fines per 100 square feet of garden space.
Since your garden is 360 sq ft, you will need between 3.6 to 7.2 pounds of potash ultra fines.
Application:
Evenly spread the measured amount over your garden area.
Lightly rake the potash into the soil. If not able to rake into soil move to step 4. watering.
Watering:
Water the area thoroughly after application with Microbe Manna Flora and Quantum Growth Organic Total to help the potash integrate into the soil.
Additional Tips
Pre-Planting: Apply the potash at least a few weeks before planting to allow the nutrients to settle into the soil.
Monitoring: Keep an eye on soil moisture and adjust watering as needed to maintain optimal growing conditions for your watermelon.
We hope this helps! If you have any further questions or need more assistance, feel free to reach out. Thank you again for your business, and we look forward to serving you again soon!
Best regards,
The Rocky Mountain BioAg:registered: Team

Necrosis in Palms

We purchased this product because our palm trees were struggling to thrive. In three months we should be able to see whether this soil supplement has helped. We will repeat the fertilization program twice a year if we see improvement. Attached are before photos. I will review my next order with follow-up photos. I will be placing another order.

Thank you so much for taking the time to share your experience with our soil supplement. We're truly grateful for your business and trust in our product to help your palm trees flourish. It's wonderful to hear that you're committed to the fertilization program and planning for future orders based on the anticipated results.

We eagerly await your follow-up photos and are confident you'll see the improvement you're hoping for in your palm trees. Your approach to monitoring and documenting the progress is commendable, and we believe it will provide valuable insight for both you and other customers considering this solution.

Please do not hesitate to reach out if you have any questions or need further assistance as you continue with the program. We're here to support you and ensure your palm trees thrive. Looking forward to serving you again soon and seeing the transformation in your next order review!

Warm regards,
TEAM RMBA

Thank you

Arrived quickly and in great condition. Good price and quality. Amazing customer service. Can't wait to use on my home garden.

Great to hear that your Sulfate of Potash was received quickly and packaged well! Happy you love our customer service. Thank you for the business we look forward to serving you again soon!

ROCKY MOUNTAIN BioAg Review

I'm very happy with their promptness and support. In all of the years shopping online, I've never received a personalized video thank you! Well done!

This is great to hear! We strive for 100% customer satisfaction and take care of ALL of our customers how we would want to be treated! Thanks for the business, we look forward to serving you again soon!

Customer service

Customer service is great, even follow up questions were answered in a friendly manner. Product was as expected.

Great to hear that you feel our customer service is GREAT and all your follow up questions were answered in a friendly manner and the product was as expected. Thanks for the business, we look forward to serving you again soon!

1 2

Organic is just the start

RMBA is committed to provide natural and organic products that support healthy soils. Even if a product is not listed as 'organic' you can rest assured that it will help, not hurt your soil.

Came promptly, looks like it

Came promptly, looks like it will work for the job and last long enough to get it done, yay!

Love to hear it! :rocket: Glad the DeBudder Bucket Lid arrived fast and feels up to the task. When you put it to work, we’d love an update on how it goes. Thanks for choosing Rocky Mountain BioAg:registered:! :seedling:

New Product

I am a TLO grower(true living Organics) and just started using Quantum and there other product's and my veg plants seem to be doing great. Jim

Thanks so much, Jim! :raised_hands:
Love hearing this from a TLO grower—Quantum Growth Organic Light pairs beautifully with living soils by supporting the microbial engine you’ve already built. Thrilled your veg plants are thriving!

We appreciate you choosing Rocky Mountain BioAg:registered: and can’t wait to hear how things look as you keep growing. :seedling:
—The RMBA Team | Biological…Beyond Organic:registered:

Noticeable results in days.

:seedling: We love hearing that! Noticeable results in just days is exactly what the Microbe Manna:registered: ABC Lawn & Landscape Care Program is all about—jumpstarting soil biology so your lawn can show fast, healthy growth.

Thank you for sharing your success and for trusting Rocky Mountain BioAg:registered:. We’re grateful to have you in the Biological…Beyond Organic:registered: family!

—The RMBA Team

Works great

I've been using this for years and has been doing a great job!

Thank you so much for your continued trust and support! :herb: We’re thrilled to hear Tick Killz has been working great for you year after year. Consistent results are exactly what we aim for, and your feedback means a lot to us!

So far, so good. The

So far, so good. The product applied well through a tractor sprayer. Now, we wait for rain, and see the results on our hayfields.

Thank you for sharing your experience with AgroThrive LFN! We’re glad to hear the application went smoothly with your tractor sprayer. A good rain can really help activate the nutrients, so we’re excited to hear how your hayfields respond. Please keep us posted on your results — we love seeing before-and-after stories from our customers!

Sulfate of Potash | Diamond K Ultra Fine Potassium Sulfate | RMBA

Premium Ultra-Fine Sulfate of Potash (0-0-50)

Key Benefits for Your Crops

Application Guidelines

Technical Specifications

Perfect For

Customer Reviews

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Organic is just the start

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Sulfate of Potash | Diamond K Ultra Fine Potassium Sulfate | RMBA

Premium Ultra-Fine Sulfate of Potash (0-0-50)

Key Benefits for Your Crops

Application Guidelines

Technical Specifications

Perfect For

Customer Reviews

Organic is just the start

Let customers speak for us