{"title":"Add Sulfur","description":"\u003cp\u003eSulfur sources for your soil: 90% sulfur granules to supply sulfur and help lower soil pH, and gypsum (calcium sulfate) to add sulfur and calcium without changing pH.\u003c\/p\u003e","products":[{"product_id":"gypsum-powdered","title":"Powdered Agricultural Gypsum (Terra Alba Calcium Sulfate)","description":"\u003ch2\u003eCalcium Sulfate for Soil Structure and Fertility\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAgricultural Gypsum\u003c\/strong\u003e (Calcium Sulfate, CaSO\u003csub\u003e4\u003c\/sub\u003e) is a versatile soil treatment that works as an amendment, conditioner and fertilizer. As a high-quality source of calcium and sulfur, it helps improve soil structure and fertility across a range of conditions.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #f1f8e9; border: 1px solid #c8e6c9; border-left: 5px solid #2e7d32; padding: 18px; margin-bottom: 25px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin-top: 0; color: #1b5e20; font-size: 1.1em;\"\u003e\u003cstrong\u003eKey things we want you to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Heavy, waterlogged or sodic soils, where it improves clay structure, drainage and root development.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eWhy powdered:\u003c\/strong\u003e Micronized Terra Alba (98% calcium sulfate dihydrate) works at lower rates than non-soluble gypsum, but applied more often. Prefer a granular form? See Granulated Agricultural Gypsum.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eRates:\u003c\/strong\u003e 50 to 400 lb per acre, or 1 to 10 lb per acre foliar. It can also be used for fertigation.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eCertifications:\u003c\/strong\u003e WSDA Organic Input Material\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003eIdeal for heavy, waterlogged or sodic soils, gypsum improves the structure of clay-bound soils, promotes better drainage and root development, and supports long-term soil health and sustainability in both garden and field applications.\u003c\/p\u003e\u003cp\u003eRead more about \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/the-many-advantages-of-gypsum.pdf?v=1709261290\" title=\"The many advantages of gypsum\" rel=\"noopener\" target=\"_blank\"\u003ethe many advantages of gypsum (PDF, opens in new tab)\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eGuaranteed Analysis\u003c\/h2\u003e\u003cp\u003eTerra Alba Gypsum, Micronized:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCalcium Sulfate Dihydrate (CaSO\u003csub\u003e4\u003c\/sub\u003e·2H\u003csub\u003e2\u003c\/sub\u003eO): 98%\u003c\/li\u003e\n\u003cli\u003eCalcium (Ca): 22.5%\u003c\/li\u003e\n\u003cli\u003eSulfur (S): 17.6%\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDerived from gypsum.\u003c\/p\u003e\u003ch2\u003eSuggested Application\u003c\/h2\u003e\u003cp\u003eUse as directed by soil analysis.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUse at lower rates (50-400 lb\/acre) than non-soluble gypsum, but more frequently.\u003c\/li\u003e\n\u003cli\u003eFor foliar use, apply 1-10 lb\/acre.\u003c\/li\u003e\n\u003cli\u003eCan be used for fertigation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eLab Reports \u0026amp; Resources\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/Product-Data-Sheet-ASM-Terra-Alba-Gypsum_Product-Data-Spec-Sheet-customer-assurance-01-13-2021_5.pdf?v=1765318924\" title=\"Terra Alba Gypsum Product Data Sheet\" rel=\"noopener\" target=\"_blank\"\u003eProduct Data Sheet (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/Untitled_design-1.pdf?v=1765319212\" title=\"Gypsum Heavy Metals Test results\" rel=\"noopener\" target=\"_blank\"\u003eHeavy Metals Test (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated products\u003c\/h2\u003e\u003cp\u003ePrefer a granular form? See \u003ca href=\"\/products\/gypsum-granulated\"\u003eGranulated Agricultural Gypsum\u003c\/a\u003e.\u003c\/p\u003e","brand":"KIS Organics","offers":[{"title":"Terra Alba Powdered 12 lbs","offer_id":48798548099303,"sku":"GYPSUM-TA-12LB","price":32.0,"currency_code":"USD","in_stock":true},{"title":"Terra Alba Powdered 20 lbs","offer_id":48798549147879,"sku":"GYPSUM-TA-20LB","price":47.0,"currency_code":"USD","in_stock":true},{"title":"Terra Alba Powdered 50 lbs","offer_id":48798553637095,"sku":"GYPSUM-TA-50LB","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/gypsum-powdered-terra-alba-bag.png?v=1792549407"},{"product_id":"k-mag-potassium-magnesium-sulfur-soil-amendment","title":"K-Mag Potassium Magnesium Sulfur Soil Amendment 0-0-22","description":"\u003ch2\u003ePotassium, Magnesium \u0026amp; Sulfur in One Natural Mineral\u003c\/h2\u003e\u003cp\u003eK-Mag is a unique 3-in-1 combination of potassium, magnesium and sulfur. It is a naturally occurring source of these three vital plant nutrients. Potassium is essential for high quality fruit, magnesium is required for the synthesis of chlorophyll, and sulfur is needed for enzyme activation.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #f1f8e9; border: 1px solid #c8e6c9; border-left: 5px solid #2e7d32; padding: 18px; margin-bottom: 25px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin-top: 0; color: #1b5e20; font-size: 1.1em;\"\u003e\u003cstrong\u003eKey things we want you to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eWhat it does:\u003c\/strong\u003e Supplies potassium (21 to 22% potash), magnesium (10.5 to 10.8%) and sulfur (21 to 22%) in one water-soluble sulfate product.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e Potassium supports fruit quality, magnesium builds chlorophyll and sulfur activates enzymes.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eSizes:\u003c\/strong\u003e 12, 25 and 50 lb.\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003eK-Mag supplies a balanced package of three essential nutrients (K, Mg and S) in the highly available, water-soluble sulfate form.\u003c\/p\u003e\u003ch2\u003eKey Nutrients\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-22% Potash (K\u003csub\u003e2\u003c\/sub\u003eO), 18.2% Potassium (K):\u003c\/strong\u003e Known as the \"quality\" nutrient. A good source of potassium, K-Mag promotes healthy root systems and increases plant vigor and resistance to disease and cold. Potassium is also essential in sugar and starch formation and the movement of nutrients through plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10.5-10.8% Magnesium (Mg), 18% Magnesia (MgO):\u003c\/strong\u003e Magnesium is the central component of chlorophyll, the pigment molecule that absorbs sunlight during photosynthesis. Providing magnesium and potassium in the proper balance, K-Mag helps increase plant strength and builds resistance to winter kill, drying, insect attack and spray damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-22% Sulfur (S), 67% Sulfate (SO\u003csub\u003e4\u003c\/sub\u003e):\u003c\/strong\u003e Sulfur helps build proteins in plants and is a key component of many unique traits. It puts the \"green and leafy\" into crops like spinach, gives garlic and asparagus their distinctive flavors, and improves the baking quality of wheat. Because it is in the sulfate form, it aids initial root growth and promotes seed production and vigorous plant growth.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFive More Reasons to Use K-Mag\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eResists leaching:\u003c\/strong\u003e K-Mag is 100 percent water soluble, so it goes to work as soon as there is enough soil moisture to support crop growth. K-Mag Granular dissolves slowly, resisting rapid leaching from the soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEssentially chloride-free:\u003c\/strong\u003e Maximum chloride content is less than 2.5 percent, minimizing the potential for fertilizer \"burn.\" It is widely used on sensitive vegetable and fruit crops and other crops that do not tolerate chloride well.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvides a balance of nutrients:\u003c\/strong\u003e K-Mag supplies potassium, magnesium and sulfur in a balanced proportion that fits the nutrient needs of many crops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes not change soil pH:\u003c\/strong\u003e Regardless of application rate, K-Mag does not change soil pH because it is a neutral salt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreases profit per acre:\u003c\/strong\u003e Crop producers around the world have reported extra profit per acre with K-Mag, especially on magnesium- and sulfur-deficient soils. Results depend on crop, soil type and growing conditions.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eK-Mag can be used as part of a complete fertilizer for the crop or applied directly to the soil.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eInformation derived from kmag.com.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eLab Reports \u0026amp; Resources\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/NEW_KMag_Heavy_Metals_Results.pdf?v=1683748658\" title=\"K-Mag Heavy Metals Test results\" rel=\"noopener\" target=\"_blank\"\u003eK-Mag Heavy Metals Test (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eRelated Soil Minerals\u003c\/h2\u003e\u003cp\u003eExplore other soil minerals: \u003ca href=\"\/products\/azomite-trace-mineral-soil-amendment\"\u003eAZOMITE Trace Mineral Soil Amendment\u003c\/a\u003e, \u003ca href=\"\/products\/gaia-green-glacial-rock-dust\"\u003eGaia Green Glacial Rock Dust\u003c\/a\u003e and \u003ca href=\"\/products\/magnesium-sulfate-epsom-salt\"\u003eMagnesium Sulfate (Epsom Salt)\u003c\/a\u003e.\u003c\/p\u003e","brand":"KIS Organics","offers":[{"title":"12 lbs","offer_id":11827992257,"sku":"KMAG-12LB","price":47.0,"currency_code":"USD","in_stock":true},{"title":"25 lbs","offer_id":17256403777,"sku":"KMAG-25LB","price":63.0,"currency_code":"USD","in_stock":true},{"title":"50 lbs","offer_id":11828050241,"sku":"KMAG-50LB","price":51.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/products\/k-mag-granules-in-hand.jpg?v=1792547733"},{"product_id":"yellowstone-montana-sulfur-granules","title":"Yellowstone Montana 90% Sulfur Granules","description":"\u003ch2\u003eDisintegrating Sulfur-Bentonite Granules\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eYellowstone Brand 90% Disintegrating Sulfur Granules\u003c\/strong\u003e are a quality sulfur-bentonite product that degrades readily on contact with moisture in the soil. This provides a large surface area of sulfur to be oxidized to the sulfate form of sulfur.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #f1f8e9; border: 1px solid #c8e6c9; border-left: 5px solid #2e7d32; padding: 18px; margin-bottom: 25px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin-top: 0; color: #1b5e20; font-size: 1.1em;\"\u003e\u003cstrong\u003eKey things we want you to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eSulfur content:\u003c\/strong\u003e 90%+ elemental sulfur with 8% to 10% bentonite.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eHow it works:\u003c\/strong\u003e Granules disintegrate on contact with soil moisture, so the sulfur can oxidize to the sulfate form.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eTested:\u003c\/strong\u003e Heavy metals report below.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eCertifications:\u003c\/strong\u003e OMRI Listed\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003eOMRI listed for organic use. Quality sulfur-bentonite granules for agricultural use, made in Montana, USA.\u003c\/p\u003e\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur content:\u003c\/strong\u003e 90+ wt.-% minimum as elemental sulfur\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBentonite:\u003c\/strong\u003e 8% to 10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor \/ appearance:\u003c\/strong\u003e Light yellow-green, small split-pea-like solid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk density:\u003c\/strong\u003e Approx. 80 lb per cubic foot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource:\u003c\/strong\u003e Produced from high quality \"Claus\" sulfur\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScreen specification:\u003c\/strong\u003e Smaller than 5 mesh (0.159 in opening) and larger than 9 mesh (0.079 in opening)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eLab Reports \u0026amp; Resources\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/NEW_Sulfur_Heavy_Metals_Results.pdf?v=1683748650\" title=\"Yellowstone Sulfur Heavy Metals Test results\" rel=\"noopener\" target=\"_blank\"\u003eYellowstone Sulfur Heavy Metals Test (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"KIS Organics","offers":[{"title":"1 lb","offer_id":50397669130471,"sku":"SULFUR-01LB","price":20.0,"currency_code":"USD","in_stock":true},{"title":"10 lbs","offer_id":34535292764309,"sku":"SULFUR-10LB","price":40.0,"currency_code":"USD","in_stock":true},{"title":"21 lbs","offer_id":34535292797077,"sku":"SULFUR-21LB","price":58.0,"currency_code":"USD","in_stock":true},{"title":"50 lbs","offer_id":34535292829845,"sku":"SULFUR-50LB","price":52.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/yellowstone-sulfur-granules-kis-bag.jpg?v=1792550157"},{"product_id":"gypsum-granulated","title":"Granulated Agricultural Gypsum (Microna Prill)","description":"\u003cp\u003e\u003cstrong\u003eAgricultural Gypsum\u003c\/strong\u003e (Calcium Sulfate – CaSO₄) is a versatile soil treatment that functions as an amendment, conditioner, and fertilizer. As a high-quality source of calcium and sulfur, it helps improve soil structure and fertility across a range of conditions. Ideal for heavy, waterlogged, or sodic soils, gypsum enhances the structure of clay-bound soils, promotes better drainage and root development, and supports long-term soil health and sustainability in both garden and field applications.\u003c\/p\u003e\n\u003cdiv style=\"background-color: #f1f8e9; border: 1px solid #c8e6c9; border-left: 5px solid #2e7d32; padding: 18px; margin-bottom: 25px; border-radius: 4px;\"\u003e\n\u003cp style=\"margin-top: 0; color: #1b5e20; font-size: 1.1em;\"\u003e\u003cstrong\u003eKey things we want you to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003e\u003cstrong\u003eMicrona Prill Granular Gypsum Highlights\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 8px;\"\u003eAdds essential calcium and sulfur nutrients with low dust for easy blending and precision application at reduced rates. Helps leach out harmful salts and improves soil structure. The micronized dihydrate form dissolves rapidly upon watering.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eCertifications:\u003c\/strong\u003e CDFA Certified Organic Input Material, WSDA Organic Input Material\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eGuaranteed Analysis\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium (Ca):\u003c\/strong\u003e 21%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulfur (S):\u003c\/strong\u003e 17%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium Sulfate Dihydrate (CaSO₄·2H₂O):\u003c\/strong\u003e 92%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSuggested Application Rates\u003c\/h2\u003e\n\u003cp\u003eUse as directed by a \u003ca href=\"\/products\/soil-test-analysis-report\"\u003eLogan Labs soil analysis\u003c\/a\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eApply directly to the soil surface or into the seed furrow.\u003c\/li\u003e\n\u003cli\u003eThe consistent size of the round prill allows for convenient blending with other dry amendments and even coverage.\u003c\/li\u003e\n\u003cli\u003eAccurate in variable-rate applications for commercial farms or home garden beds.\u003c\/li\u003e\n\u003cli\u003eCan be applied anytime during the year. While it is best to spread and water thoroughly afterward, only small amounts of moisture are necessary to activate the product.\u003c\/li\u003e\n\u003cli\u003eFor building custom soil mixes, see our \u003ca href=\"\/blogs\/news\/98112897-mixing-your-own-soil-using-the-kis-nutrient-pack\"\u003eWater-Only Soil Recipe \u0026amp; Mixing Guide\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources \u0026amp; Lab Reports\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/the-many-advantages-of-gypsum.pdf?v=1709261290\" rel=\"noopener\" target=\"_blank\"\u003eThe Many Advantages of Agricultural Gypsum (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/pro_prill_gypsum.jpg?v=1709073642\" rel=\"noopener\" target=\"_blank\"\u003eMicrona Pro Gypsum Heavy Metal Test (PDF, opens in new tab)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/soil-analysis-support-page\"\u003eSoil Analysis Support \u0026amp; Sampling Guidelines\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KIS Organics","offers":[{"title":"Microna Granular 50 lbs","offer_id":51622476873959,"sku":"GYPSUM-50LB","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/files\/microna-pro-granulated-agricultural-gypsum-50lb-bag.png?v=1792543384"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1149\/6312\/collections\/yellowstone-sulfur-granules-kis-bag.jpg?v=1794254012","url":"https:\/\/www.kisorganics.com\/collections\/add-sulfur.oembed","provider":"KiS Organics","version":"1.0","type":"link"}