{"product_id":"southern-ag-4-18-38-hydroponic-fertilizer","title":"Southern Ag 4-18-38 Hydroponic Fertilizer - 25 Lbs.","description":"\u003ch4 data-section-id=\"1hrgvm2\" data-start=\"787\" data-end=\"840\"\u003eSouthern Ag 4-18-38 Hydroponic Fertilizer\u003c\/h4\u003e\n\u003cp data-start=\"842\" data-end=\"1431\"\u003e\u003cem\u003e\u003cstrong data-start=\"842\" data-end=\"887\"\u003eWater-soluble 4-18-38 hydroponic tomato fertilizer with key nutrients and trace elements for soilless systems. 25 lb bag.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-start=\"842\" data-end=\"1431\"\u003e\u003cstrong data-start=\"842\" data-end=\"887\"\u003eSouthern Ag 4-18-38 Hydroponic Fertilizer\u003c\/strong\u003e, also known as \u003cstrong data-start=\"903\" data-end=\"932\"\u003eHydroponic Tomato Special\u003c\/strong\u003e, is a concentrated, water-soluble dry fertilizer designed for hydroponic and soilless growing systems. With a high-potassium 4-18-38 nutrient profile and essential micronutrients, this formula is well-suited for tomato-focused hydroponic feeding programs and other vegetable-growing setups that require a dependable soluble fertilizer base. The official label identifies it as formulated for soilless culture and lists the net weight as \u003cstrong data-start=\"1370\" data-end=\"1392\"\u003e25 lbs. \/ 11.34 kg\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1433\" data-end=\"1882\"\u003eUse Southern Ag 4-18-38 as part of a complete nutrient mix with \u003cstrong data-start=\"1497\" data-end=\"1518\"\u003emagnesium sulfate\u003c\/strong\u003e and \u003cstrong data-start=\"1523\" data-end=\"1542\"\u003ecalcium nitrate\u003c\/strong\u003e according to label directions. Its dry crystal form makes it a practical choice for growers who mix fresh nutrient solution for reservoirs, spray tanks, and transplant applications. The SDS lists the product’s recommended use as a water-soluble fertilizer and describes it as a solid crystal material. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"17xbmye\" data-start=\"1884\" data-end=\"1899\"\u003eKey Benefits\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"1901\" data-end=\"2505\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"1901\" data-end=\"1929\"\u003e\n\u003ctr data-start=\"1901\" data-end=\"1929\"\u003e\n\u003cth data-start=\"1901\" data-end=\"1911\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eBenefit\u003c\/th\u003e\n\u003cth data-start=\"1911\" data-end=\"1929\" data-col-size=\"md\" class=\"last:pe-10\"\u003eWhy It Matters\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"1940\" data-end=\"2505\"\u003e\n\u003ctr data-start=\"1940\" data-end=\"2067\"\u003e\n\u003ctd data-start=\"1940\" data-end=\"1966\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"1942\" data-end=\"1965\"\u003e4-18-38 NPK profile\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"1966\" data-end=\"2067\" data-col-size=\"md\"\u003eProvides nitrogen, available phosphoric acid, and soluble potash for hydroponic feeding programs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2068\" data-end=\"2181\"\u003e\n\u003ctd data-start=\"2068\" data-end=\"2097\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2070\" data-end=\"2096\"\u003eHigh potassium content\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2097\" data-end=\"2181\" data-col-size=\"md\"\u003eUseful for fruiting crop nutrition programs where potassium demand is important.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2182\" data-end=\"2276\"\u003e\n\u003ctd data-start=\"2182\" data-end=\"2210\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2184\" data-end=\"2209\"\u003eMicronutrient package\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2210\" data-end=\"2276\" data-col-size=\"md\"\u003eIncludes boron, copper, iron, manganese, molybdenum, and zinc.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2277\" data-end=\"2392\"\u003e\n\u003ctd data-start=\"2277\" data-end=\"2309\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2279\" data-end=\"2308\"\u003eMade for soilless culture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2309\" data-end=\"2392\" data-col-size=\"md\"\u003eLabel states the fertilizer is formulated for plants grown in soilless systems.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2393\" data-end=\"2505\"\u003e\n\u003ctd data-start=\"2393\" data-end=\"2415\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2395\" data-end=\"2414\"\u003e25 lb bulk size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2415\" data-end=\"2505\" data-col-size=\"md\"\u003eSuitable for frequent mixing, hydroponic gardens, greenhouse use, and serious growers.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 data-section-id=\"18kb6qx\" data-start=\"2507\" data-end=\"2529\"\u003eGuaranteed Analysis\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2531\" data-end=\"3009\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2531\" data-end=\"2563\"\u003e\n\u003ctr data-start=\"2531\" data-end=\"2563\"\u003e\n\u003cth data-start=\"2531\" data-end=\"2542\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eNutrient\u003c\/th\u003e\n\u003cth data-start=\"2542\" data-end=\"2563\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eGuaranteed Amount\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2575\" data-end=\"3009\"\u003e\n\u003ctr data-start=\"2575\" data-end=\"2609\"\u003e\n\u003ctd data-start=\"2575\" data-end=\"2596\" data-col-size=\"sm\"\u003eTotal Nitrogen (N)\u003c\/td\u003e\n\u003ctd data-start=\"2596\" data-end=\"2609\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2598\" data-end=\"2607\"\u003e4.00%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2610\" data-end=\"2642\"\u003e\n\u003ctd data-start=\"2610\" data-end=\"2629\" data-col-size=\"sm\"\u003eNitrate Nitrogen\u003c\/td\u003e\n\u003ctd data-start=\"2629\" data-end=\"2642\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2631\" data-end=\"2640\"\u003e3.50%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2643\" data-end=\"2678\"\u003e\n\u003ctd data-start=\"2643\" data-end=\"2665\" data-col-size=\"sm\"\u003eAmmoniacal Nitrogen\u003c\/td\u003e\n\u003ctd data-start=\"2665\" data-end=\"2678\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2667\" data-end=\"2676\"\u003e0.50%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2679\" data-end=\"2728\"\u003e\n\u003ctd data-start=\"2679\" data-end=\"2714\" data-col-size=\"sm\"\u003eAvailable Phosphoric Acid (P₂O₅)\u003c\/td\u003e\n\u003ctd data-start=\"2714\" data-end=\"2728\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2716\" data-end=\"2726\"\u003e18.00%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2729\" data-end=\"2766\"\u003e\n\u003ctd data-start=\"2729\" data-end=\"2752\" data-col-size=\"sm\"\u003eSoluble Potash (K₂O)\u003c\/td\u003e\n\u003ctd data-start=\"2752\" data-end=\"2766\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2754\" data-end=\"2764\"\u003e38.00%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2767\" data-end=\"2792\"\u003e\n\u003ctd data-start=\"2767\" data-end=\"2779\" data-col-size=\"sm\"\u003eBoron (B)\u003c\/td\u003e\n\u003ctd data-start=\"2779\" data-end=\"2792\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2781\" data-end=\"2790\"\u003e0.20%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2793\" data-end=\"2820\"\u003e\n\u003ctd data-start=\"2793\" data-end=\"2807\" data-col-size=\"sm\"\u003eCopper (Cu)\u003c\/td\u003e\n\u003ctd data-start=\"2807\" data-end=\"2820\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2809\" data-end=\"2818\"\u003e0.05%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2821\" data-end=\"2856\"\u003e\n\u003ctd data-start=\"2821\" data-end=\"2843\" data-col-size=\"sm\"\u003eIron (Fe), chelated\u003c\/td\u003e\n\u003ctd data-start=\"2843\" data-end=\"2856\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2845\" data-end=\"2854\"\u003e0.40%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2857\" data-end=\"2902\"\u003e\n\u003ctd data-start=\"2857\" data-end=\"2889\" data-col-size=\"sm\"\u003eManganese (Mn), water soluble\u003c\/td\u003e\n\u003ctd data-start=\"2889\" data-end=\"2902\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2891\" data-end=\"2900\"\u003e0.20%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2903\" data-end=\"2934\"\u003e\n\u003ctd data-start=\"2903\" data-end=\"2921\" data-col-size=\"sm\"\u003eMolybdenum (Mo)\u003c\/td\u003e\n\u003ctd data-start=\"2921\" data-end=\"2934\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2923\" data-end=\"2932\"\u003e0.01%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2935\" data-end=\"2970\"\u003e\n\u003ctd data-start=\"2935\" data-end=\"2957\" data-col-size=\"sm\"\u003eZinc (Zn), chelated\u003c\/td\u003e\n\u003ctd data-start=\"2957\" data-end=\"2970\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2959\" data-end=\"2968\"\u003e0.05%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2971\" data-end=\"3009\"\u003e\n\u003ctd data-start=\"2971\" data-end=\"2982\" data-col-size=\"sm\"\u003eChlorine\u003c\/td\u003e\n\u003ctd data-start=\"2982\" data-end=\"3009\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2984\" data-end=\"3007\"\u003eNot more than 1.00%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"3011\" data-end=\"3335\"\u003eThe guaranteed analysis above follows the official Southern Ag label. Nutrient sources listed on the label include potassium nitrate, potassium phosphate, potassium sulfate, ammonium phosphate, boric acid, copper sulfate, ferric DTPA, manganese sulfate, sodium molybdate, and zinc EDTA. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"19l1vqr\" data-start=\"3337\" data-end=\"3361\"\u003eLabel Mixing Snapshot\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3363\" data-end=\"3816\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3363\" data-end=\"3403\"\u003e\n\u003ctr data-start=\"3363\" data-end=\"3403\"\u003e\n\u003cth data-start=\"3363\" data-end=\"3377\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eApplication\u003c\/th\u003e\n\u003cth data-start=\"3377\" data-end=\"3403\" data-col-size=\"xl\" class=\"last:pe-10\"\u003eLabel Mixing Direction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3414\" data-end=\"3816\"\u003e\n\u003ctr data-start=\"3414\" data-end=\"3656\"\u003e\n\u003ctd data-start=\"3414\" data-end=\"3453\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"3416\" data-end=\"3452\"\u003eSpray tank \/ transplant solution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"3453\" data-end=\"3656\" data-col-size=\"xl\"\u003eMix \u003cstrong data-start=\"3459\" data-end=\"3476\"\u003e8 oz. \/ 227 g\u003c\/strong\u003e of Southern Ag 4-18-38 with \u003cstrong data-start=\"3505\" data-end=\"3522\"\u003e5 oz. \/ 142 g\u003c\/strong\u003e magnesium sulfate in \u003cstrong data-start=\"3544\" data-end=\"3568\"\u003e100 gallons of water\u003c\/strong\u003e. Once dissolved, add \u003cstrong data-start=\"3590\" data-end=\"3613\"\u003e6–8 oz. \/ 170–227 g\u003c\/strong\u003e calcium nitrate and dissolve completely.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3657\" data-end=\"3714\"\u003e\n\u003ctd data-start=\"3657\" data-end=\"3684\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"3659\" data-end=\"3683\"\u003eApplication interval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"3684\" data-end=\"3714\" data-col-size=\"xl\"\u003eApply every \u003cstrong data-start=\"3698\" data-end=\"3711\"\u003e1–2 weeks\u003c\/strong\u003e.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3715\" data-end=\"3816\"\u003e\n\u003ctd data-start=\"3715\" data-end=\"3731\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"3717\" data-end=\"3730\"\u003eSeedlings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"3731\" data-end=\"3816\" data-col-size=\"xl\"\u003eUse \u003cstrong data-start=\"3737\" data-end=\"3750\"\u003ehalf rate\u003c\/strong\u003e during early seedling growth until plants are well established.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"3818\" data-end=\"4053\"\u003eAlways follow the product label, adjust for your crop, water quality, and growing system, and avoid combining with Bordeaux, lime, or highly alkaline materials unless compatibility has been tested. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"3ipjz4\" data-start=\"4055\" data-end=\"4080\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"4082\" data-end=\"4559\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"4082\" data-end=\"4109\"\u003e\n\u003ctr data-start=\"4082\" data-end=\"4109\"\u003e\n\u003cth data-start=\"4082\" data-end=\"4098\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"4098\" data-end=\"4109\" data-col-size=\"md\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"4120\" data-end=\"4559\"\u003e\n\u003ctr data-start=\"4120\" data-end=\"4143\"\u003e\n\u003ctd data-start=\"4120\" data-end=\"4128\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-start=\"4128\" data-end=\"4143\" data-col-size=\"md\"\u003eSouthern Ag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4144\" data-end=\"4220\"\u003e\n\u003ctd data-start=\"4144\" data-end=\"4159\" data-col-size=\"sm\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd data-start=\"4159\" data-end=\"4220\" data-col-size=\"md\"\u003e4-18-38 Hydroponic Fertilizer \/ Hydroponic Tomato Special\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4221\" data-end=\"4242\"\u003e\n\u003ctd data-start=\"4221\" data-end=\"4231\" data-col-size=\"sm\"\u003eFormula\u003c\/td\u003e\n\u003ctd data-start=\"4231\" data-end=\"4242\" data-col-size=\"md\"\u003e4-18-38\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4243\" data-end=\"4286\"\u003e\n\u003ctd data-start=\"4243\" data-end=\"4258\" data-col-size=\"sm\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-start=\"4258\" data-end=\"4286\" data-col-size=\"md\"\u003eWater-soluble fertilizer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4287\" data-end=\"4310\"\u003e\n\u003ctd data-start=\"4287\" data-end=\"4294\" data-col-size=\"sm\"\u003eForm\u003c\/td\u003e\n\u003ctd data-start=\"4294\" data-end=\"4310\" data-col-size=\"md\"\u003eDry crystals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4311\" data-end=\"4346\"\u003e\n\u003ctd data-start=\"4311\" data-end=\"4324\" data-col-size=\"sm\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd data-start=\"4324\" data-end=\"4346\" data-col-size=\"md\"\u003e25 lbs. \/ 11.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4347\" data-end=\"4401\"\u003e\n\u003ctd data-start=\"4347\" data-end=\"4358\" data-col-size=\"sm\"\u003eBest For\u003c\/td\u003e\n\u003ctd data-start=\"4358\" data-end=\"4401\" data-col-size=\"md\"\u003eHydroponic and soilless growing systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4402\" data-end=\"4476\"\u003e\n\u003ctd data-start=\"4402\" data-end=\"4413\" data-col-size=\"sm\"\u003eUse With\u003c\/td\u003e\n\u003ctd data-start=\"4413\" data-end=\"4476\" data-col-size=\"md\"\u003eMagnesium sulfate and calcium nitrate, per label directions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4477\" data-end=\"4559\"\u003e\n\u003ctd data-start=\"4477\" data-end=\"4487\" data-col-size=\"sm\"\u003eStorage\u003c\/td\u003e\n\u003ctd data-start=\"4487\" data-end=\"4559\" data-col-size=\"md\"\u003eStore in a cool, dry area away from heat and incompatible materials.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"4561\" data-end=\"4763\"\u003eStorage and handling guidance is based on the SDS, which also recommends avoiding dust formation and avoiding contact with skin, eyes, and clothing during handling. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5 data-section-id=\"1izxds0\" data-start=\"4765\" data-end=\"4784\"\u003eFAQ\u003c\/h5\u003e\n\u003cp data-start=\"4786\" data-end=\"5033\"\u003e\u003cstrong data-start=\"4786\" data-end=\"4849\"\u003eWhat is Southern Ag 4-18-38 Hydroponic Fertilizer used for?\u003c\/strong\u003e\u003cbr data-start=\"4849\" data-end=\"4852\"\u003eIt is a water-soluble fertilizer formulated for plants grown in soilless culture, especially hydroponic tomato and vegetable nutrient programs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5035\" data-end=\"5307\"\u003e\u003cstrong data-start=\"5035\" data-end=\"5081\"\u003eCan Southern Ag 4-18-38 be used by itself?\u003c\/strong\u003e\u003cbr data-start=\"5081\" data-end=\"5084\"\u003eFor the label’s hydroponic mix, it should be combined with magnesium sulfate first, then calcium nitrate after the solution has dissolved. Follow the label for exact rates and sequence. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5309\" data-end=\"5519\"\u003e\u003cstrong data-start=\"5309\" data-end=\"5336\"\u003eWhat does 4-18-38 mean?\u003c\/strong\u003e\u003cbr data-start=\"5336\" data-end=\"5339\"\u003eThe numbers refer to the guaranteed fertilizer analysis: \u003cstrong data-start=\"5396\" data-end=\"5417\"\u003e4% total nitrogen\u003c\/strong\u003e, \u003cstrong data-start=\"5419\" data-end=\"5452\"\u003e18% available phosphoric acid\u003c\/strong\u003e, and \u003cstrong data-start=\"5458\" data-end=\"5480\"\u003e38% soluble potash\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5521\" data-end=\"5688\"\u003e\u003cstrong data-start=\"5521\" data-end=\"5553\"\u003eIs this a liquid fertilizer?\u003c\/strong\u003e\u003cbr data-start=\"5553\" data-end=\"5556\"\u003eNo. The SDS describes it as a solid crystal fertilizer, and it is mixed with water before use.\u003c\/p\u003e","brand":"Sounthern Ag","offers":[{"title":"Default Title","offer_id":61981838115186,"sku":null,"price":57.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0198\/8486\/files\/Hydroponic_tomato_fertilizer_-_Information2.png?v=1782506631","url":"https:\/\/www.seedworldusa.com\/products\/southern-ag-4-18-38-hydroponic-fertilizer","provider":"Seed World","version":"1.0","type":"link"}