{"product_id":"organic-ferrous-sulfate-iron-sulfate-20-iron-fe","title":"Organic Ferrous Sulfate (Iron Sulfate) | 20% Iron (Fe)","description":"\u003cp\u003eFerrous Sulfate 20% Iron is a high-purity ferrous sulfate heptahydrate (FeSO₄·7H₂O) supplying 20% soluble iron and 12% sulfur — a fast-acting, versatile single-ingredient amendment for correcting iron deficiency, supporting soil pH reduction, and managing lawn moss.\u003c\/p\u003e\n\u003cp\u003eIron deficiency (interveinal chlorosis — yellow tissue between green veins on new leaves) is usually a solubility problem rather than a supply problem: above roughly pH 7.0, soil iron converts to forms roots cannot absorb. Ferrous sulfate supplies iron already in the plant-available Fe²⁺ form, so foliar applications can produce visible green-up in new growth within days, and the oxidation chemistry that follows soil application gradually lowers root-zone pH — faster than elemental sulfur, which depends on slower microbial activity. It dissolves completely for foliar spray and soil application and also serves as an iron source for lawn moss management.\u003c\/p\u003e\n\u003cp\u003eFerrous sulfate works best in acidic to neutral soils; in persistently alkaline or free-lime calcareous soils a chelated iron source is more reliable, and it is not preferred for recirculating hydroponic systems, where Fe²⁺ precipitates out of solution. Important handling note: ferrous sulfate stains concrete, brick, stone, and fabric rust-brown on contact — sweep granules off hardscape immediately and rinse spray drift before it dries. Apply foliar sprays in cool conditions, wear gloves, and store sealed and dry, away from metal containers.\u003c\/p\u003e\n\u003cp\u003eCDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":52490167353637,"sku":"701748874129","price":19.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":52490167386405,"sku":"701748874136","price":22.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":52490167419173,"sku":"018227120289","price":26.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":52490167451941,"sku":"701748874198","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":52490167484709,"sku":"701748874204","price":49.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":52490167517477,"sku":"018227120302","price":79.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":52490167550245,"sku":"018227120296","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/5104\/0293\/files\/Ferrous_Sulfate_Iron_Sulfate.jpg?v=1780236899","url":"https:\/\/www.worldsafarishops.shop\/products\/organic-ferrous-sulfate-iron-sulfate-20-iron-fe","provider":"World Safari Shops","version":"1.0","type":"link"}