Epsom salt, how much, how often?

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cannabillion7

Well-Known Member
so i believe i have a magnesium def. so i got some epsom salt. that seems to be the way most deal with it. ive heard of a few different concentrations you mix using a gallon of water. i will be using distilled tap water so a lower concentration is probably good because of the existing ppm. any response would be great.
 
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LilCX12

Active Member
use a very weak mix per 1L of water there are 2 ways you can use it on your plants

1 - give it some while watering
2 - very weak foliar spray but do it when the plants aren't in direct light cuz this will cause hot spots on the leafs
 
Florida Girl

Florida Girl

Well-Known Member
I prefer using Cal-Mag from Botannicare with my nutes ... but I have used Epsom Salt in the past. I used a brand from the garden section of Home Depot ....and if I recall... I mixed 2 tablespoons to a gallon of water, stirred well and then filled a sprayer bottle and treated via the foliage (this was in Veg. stage). If in flowering stage I would definitely treat via the roots and not the foliage if possible.
 
gotot

gotot

Well-Known Member
cannabillion7 said:
so i believe i have a magnesium def. so i got some epsom salt. that seems to be the way most deal with it. ive heard of a few different concentrations you mix using a gallon of water. i will be using distilled tap water so a lower concentration is probably good because of the existing ppm. any response would be great.
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1 teaspoon you can foliar feed for faster results
 
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LilCX12

Active Member
I whent to my local hydro store to buy some and he told me that I could use a bit of it in the water to increase the Resin production
 
rolla8

rolla8

Well-Known Member
1tsp per gallon of water is not enough, in my opinion. I always use and recommend a treatment of 1TBSP per gallon of water poured directly into the soil. For foliar treatments, I use 2tsp per gallon of water, misted gently on all the leaves.
 
rudolph

rudolph

Active Member
gonna put a bit more in...thnks for that...i'll try a tblspoon per gallon...do you put slightly more feed in than the recommended?
 
Saerimmner

Saerimmner

Well-Known Member
Topo said:
"1g/gal"--------what the first "g" stand for? Teaspoon or tablespoon? I'm having mag issues at this time. Thanks :)
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it means 1gram per gallon as epsom salts is sold in powder not liquid form, liquid=ml/fl oz/gallon powder/solid =gram/oz/kilo etc
 
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pollen205

Well-Known Member
Just wondering can I burn my plant with this salt...never use it but thinking about add some to my soil and then transplant into it
How much for 25l od soil...and what Are the main benefit of IT. - cal/mag
 
coreywebster

coreywebster

Well-Known Member
pollen205 said:
Just wondering can I burn my plant with this salt...never use it but thinking about add some to my soil and then transplant into it
How much for 25l od soil...and what Are the main benefit of IT. - cal/mag
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Its not like lime, your better dissolving it in hot water and mixing it in with cold then watering into your soil or adding it as and when you water if needed.
Cal/mag contains calcium, magnesium and iron and is usually made from a nitrate so has Nitrogen in it too where magnesium sulphate is just magnesium and sulphur.
You shouldn't use cal/mag to foliar spray or at least not if its from nitrate form because it becomes carcinogenic and also doesn't get absorbed by leaves properly.
But magnesium sulphate/ Epsom salts, is absorbed well by leaves and thus can treat a magnesium deficiency faster by foliar spray.
 
Johneblaze

Johneblaze

Active Member
coreywebster said:
Its not like lime, your better dissolving it in hot water and mixing it in with cold then watering into your soil or adding it as and when you water if needed.
Cal/mag contains calcium, magnesium and iron and is usually made from a nitrate so has Nitrogen in it too where magnesium sulphate is just magnesium and sulphur.
You shouldn't use cal/mag to foliar spray or at least not if its from nitrate form because it becomes carcinogenic and also doesn't get absorbed by leaves properly.
But magnesium sulphate/ Epsom salts, is absorbed well by leaves and thus can treat a magnesium deficiency faster by foliar spray.
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How often can I spray to fix a deficiency
 
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