{"product_id":"s-brand-sprout-mix-enriched-worm-castings","title":"S Brand Sprout Mix – Enriched Worm Castings","description":"\u003ch2\u003eEnriched worm castings for seed starting\u003c\/h2\u003e\u003cp\u003eGive your seedlings a stronger start with Elmer’s Gold worm castings enriched with kelp, humic substances, minerals, and microbial inoculants. Blend S Brand into your seed-starting medium before planting.\u003c\/p\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eMix 1 scoop of S Brand with 3 scoops of seed-starting medium.\u003c\/strong\u003e Use the same scoop for both ingredients. This makes a 25% blend by volume—the proportion used in our trial.\u003c\/p\u003e\u003cp\u003eMix thoroughly, then plant according to your seed supplier’s instructions. Keep the growing medium moist but not waterlogged. S Brand is an amendment, not a standalone potting mix.\u003c\/p\u003e\u003ch3\u003eChoose your size\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 lb — $20:\u003c\/strong\u003e Makes about 4 gallons of finished seed-starting blend.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 lb — $60:\u003c\/strong\u003e Makes about 16 gallons of finished seed-starting blend. Four times the product for three times the price.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFinished volumes assume the 1:3 blend above and our specification estimate of 4.10 lb per gallon. Moisture and settling affect volume, so use scoops when mixing. Packages are sold by net weight; shipping is calculated at checkout.\u003c\/p\u003e\u003ch3\u003eSee our day-46 tomato comparison\u003c\/h3\u003e\u003cp\u003eWe grew red cherry tomatoes using three approaches: store-bought seed-starting mix with tap water; 75% starting mix plus 25% Elmer’s Gold with reverse-osmosis water; and 75% starting mix plus 25% S Brand with reverse-osmosis water.\u003c\/p\u003e\u003cfigure style=\"margin:1.5em 0\"\u003e\u003cimg src=\"https:\/\/iowawormfarm.com\/cdn\/shop\/files\/Iowa-Worm-Farm-SBrand-Sprout-Mix-Test-Photo-Tomatos.jpg?v=1789758836\u0026amp;width=1200\" alt=\"Day-46 red cherry tomato comparison: starting mix with tap water on the left, 25% Elmer’s Gold with reverse-osmosis water in the middle, and 25% S Brand with reverse-osmosis water on the right.\" width=\"1080\" height=\"864\" loading=\"lazy\" style=\"width:100%;height:auto\"\u003e\u003cfigcaption\u003e\u003csmall\u003ePlants shown at day 46. Both amended plants have visibly larger root systems than the control; the S Brand plant has particularly full foliage and roots.\u003c\/small\u003e\u003c\/figcaption\u003e\u003c\/figure\u003e\u003cp\u003eThis was our practical growing comparison. Because the control received a different water source, it does not separate the effect of the amendments from the effect of water. Your results will vary with seeds, growing medium, and care.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=j4DlOJpipVw\u0026amp;t=20s\"\u003eWatch the growing trial\u003c\/a\u003e for the full comparison.\u003c\/p\u003e\u003ch3\u003eWhat makes S Brand different?\u003c\/h3\u003e\u003cp\u003eWe start with Elmer’s Gold worm castings and blend in amendments that contribute kelp, humic substances, calcium, trace minerals, and microbial inoculants. You get the ingredients combined in one prepared blend, without purchasing and measuring several separate products.\u003c\/p\u003e\u003ch3\u003eStorage\u003c\/h3\u003e\u003cp\u003eKeep in a cool, shaded location away from extreme heat and direct sunlight.\u003c\/p\u003e\u003cp\u003eQuestions about your growing setup? \u003ca href=\"\/pages\/contact\"\u003eAsk Adam\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0726\/0877\/6445\/files\/sbrand-sprout-mix-growing-guide.pdf?v=1789764554\"\u003eDownload the one-page growing guide (PDF)\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/pages\/testing-growing-trials\"\u003eExplore our castings reports and growing trials\u003c\/a\u003e. The laboratory reports cover the base castings, not the finished S Brand blend.\u003c\/p\u003e","brand":"Iowa Worm Farm","offers":[{"title":"4 lb","offer_id":48455403929826,"sku":"sku-46054721159421","price":20.0,"currency_code":"USD","in_stock":true},{"title":"16 lb","offer_id":48455403962594,"sku":"sku-46054721192189","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6107\/2354\/files\/s-brand-sprout-mix-by-iowa-worm-farm-worm-castings.jpg?v=1789783454","url":"https:\/\/prairiegardener.com\/products\/s-brand-sprout-mix-enriched-worm-castings","provider":"Prairie Gardener Supply Co.","version":"1.0","type":"link"}