Magnesium Sulfate Heptahydrate thats exactly what epsom salts are i know now that i was high and saying tbsp when its tsp.i grow hydroponics anyway i have been thru the trial and error stage of dealing with the salts myself make sure it dosent have any additives you dont want any with alot of sodium and to prepare it correctly smash it to hell into a dust then dissolve it in hot water and let it sit for a bit to let the excess settle if you guys want a ton of knowledge get utorrent and download the george cervantes grow video from piratebay.org its great for beginners but hold off on that cause i have to ask my professor about epsom and regular soil just use water until you are sure
as far as dirt i found this
A pH of 6.0 is fine, but I am sure once you add your nutes it will drop a lot. Make sure to pH after mixing your nutes, and only water at like 1/2 strength the first watering or two. And if you do decide to use some epsom salt later on, I would suggest using just a pinch of epsom per gallon.
When I was using GH nutes, I had mg problems a lot, and this corrected them. I used less than a 1/4 teaspoon, which is no where near the table spoon or two that was suggested before. In my experience, you don't want to add more salts to the soil than is needed.
If your pH is correct, your plants will get their mg. But as stated before, your problem will be corrected with a simple feeding due to the fact that they have had no nutes for over 2 weeks. Feed them, and watch em perk right up for you.
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this i know for sure
Mg uptake is ph dependent so correcting the pH may correct the mg deficiency if the ph in the root zone isn't within range you can give all the mg you want it won't be absorbed high concentrations of mg in the medium screws up the ionic balance causing lock outs of other secondary nutes and trace elements.
use water thats been through revers osmosis it pulls out unnecessary salts
im gonna find a dark hole now and post up
