Epson Salt

Its a good source of Mg and S for the plant, but if it does not need it. its wasted. Most feeds desgined for soilless hydro style growing have everything the plant needs in them.

Also mix the epsom salt in ur osmosis water. Aerate it for 20 min and make sure it’s dissolved and mixed well. I do 1 tbsp per gallon of water.

Love Epsom salt. But I do organic soil mix not coco. It works great with soil. Not sure with coco/hydro.

Topdress with dolomite lime instead.

The real answer would be who else on this site or do you know is using epsom salt? The only people I’ve ever heard swear by it were the occasional floweriest who do not grow weed. If you’re needing a magnesium I’d stick with a Cal/Mag supplement, not expensive and will last a very long time.

coco is soilless. Nothing particularlly special about it despite the din of the peanut gallery. you provide a steady diet around the roots as the primary goal. it should waver much in concentratio or ratio except as a reaction to the plant in front of you. depending on what Mg or S you already provide, i'd shoot for a total elemental ppm of 75 for Mg and 100-ish for S. You'll need to see what amount of Mg or S is added with your other products used and then if a little epsom salt is needed.it's a great way to add Mg and S. However, if you do anything funky with the other nutrients, it may require more/less due to antagonistic/stimulative relationships with the other nutrient molecules. Assuming nothing else is overdosed or lacking, this should be a good level. There are online calculators and apps that can convert for you.. i don't know the 'weighted average' percent of mass to shoot for relative to dosing.. that too in conjunction with overall concentraion (EC reading) could get you there too, but elemental ppm calculated from the labels is far more dependable and accurate. https://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm Not recommending their suggestions.. just the calculator portion at bottom.. add up all your fertilizer as it's not a matter of one or the other but all that is added. The numbers they give go a bit high in N and P in late flower accorindg to mj growers handbook, whatever tf that is. 250ppm is not necesary, lol... gauranteed toxicity unless you are somehow reducing it's avilability to the plant through pH or something fucked up like that. 250ppm for soilless/hydro context fertilizer options is insane. What i've used for years and each time i deviate, i mostly come back to it as i see no improvements or reason not to... 90-130 N 40-60 P 180 k 100+ Ca 75 Mg 100 S The lower N vales are as i enter flower phase... this is predicated on how the plant looks and not just some mindless change. if the plants look a bit too lush, i'll reduce N before flower phase. So, all of this is a ballpark and in the end how the plant grows and reacts is what matters most. Local variables will impact overall concnetration needed to keep up with local growth rate. The ratios won't change much, if at all. The goal is what is around the roots, not necessarily matching what enters the plant per day. Availability around the roots is the thing we optimize in hydro/soilless context in a precise and predictable way. 10% runoff is required... cannot stress it enough. If you don't religiously get at 10% runoff or more, you will get buildup of nutrients over time in the medium. might as well grow in soil at that point.

Cook up your batch of homemade Cal-Mag supplements, using Epsom Salts (magnesium sulfate) and Calcium nitrate (a common fertilizer). The ideal ratio is two parts calcium to one part of magnesium. A safe homemade Cal-Mag concentration would be 380ppm, with 260ppm Calcium and 120ppm Magnesium. For reference, you would need around 6g of calcium nitrate and 4.5g of Epsom salts per gallon of water.

Hi, good that you ask before applying that amount is way too much. Epsom Salt is mainly used to supply magnesium and sulfur, but in coco you only need a very small amount because coco and RO water together already require a balanced nutrient plan. A common dose is around 0.5–1 g per liter of water (so 10–20 g on 20 L), depending on your plants needs and the rest of your nutrient mix. Always check your base nutrients first, since most good coco nutrients already contain enough magnesium. If you overdo it, you risk nutrient lockouts. I’d recommend starting very low (e.g., 5–10 g per 20 L), measure the EC, and slowly adjust while watching how your plants respond. My personal tip: you can also use Epsom Salt as a foliar spray. Mix it into a spray bottle at low concentration and apply under the leaves shortly before lights go out this way the plant absorbs magnesium directly and efficiently.

EpsoM salt ;) i personally if see first signs add 50ppm, if i noticed late 100 ppm extra to few feedings. Test you water base, weight like 1g of it, add it to 10 liters of water and retest. You will find amounts easy.

min-max for Mg = 35-70ppm + S per liter after that add fert EC 3.5 = (1750ppm with 0.5 ratio) that could be too much ! golden rule is to start with 700ppm per L and then adjast for the next week

Personally, i would do PLENTY of research. Ive tried and failed dramatically with epsom salts and sworw down to never do it again. If your going to do it, get plenty of research amd understanding in first before doing it, you might even change your mind.