According to the pictures, my ladies are starting to show signs of needing magnesium. Can I add epsom salt and water them and fix it? I’m about to head out of town for a few days and I want things under control for my friend to water them. I would have to order cal-mag and it won’t get here before I leave. How much do I use?
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Simple answer is yes you can use epsom salt as a mag supplement in a pinch
With out any other info on you grow that’s the best answer I can give
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Strain; Type, Bag seed, or NA: Green Crack Week 5(ish) of Veg.
Soil in pots, Hydroponic, or Coco? Soil in 3 gal fabric pots
PH of runoff or solution in reservoir? Ph is mid 6’s
What is strength of nutrient mix? EC, or TDS: FF nutrient trio
Indoor or Outdoor: Indoor
Light system, size? Less than I want but will have to do for first grow.
Humidity; Day, Night: 50-60
Ventilation system; Yes, No, Size: Passive for now.
AC, Humidifier, De-humidifier: N/A
I filled out th support ticket with my info. 
Thanks for looking
What do you mean when you say your Ph is mid 6’s? You need to know your exact Ph. It’s possible you’re getting a magnesium deficiency because your Ph is off, and adding Epsom salts won’t help unless that Ph is correct between 6.3-6.8.
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I hope this helps
Manganese (Mn) Micronutrient and Immobile Element
Manganese Helps enzymes break down for chlorophyll and photosynthesis production,
as well as it works with plant enzymes to reduce nitrates before producing proteins.
Having plants that are deficient in manganese can turn the young leaves into
spotted (mottled) yellow and or brown areas on young leaves. Dead (Necrotic)
yellow spots form on top leaves, while the lower older leaves will or may have
gray specks and or spots. Symptoms can include yellowing of leaves while the
leaf veins can stay green. Can also produce a chequered effect. As the plant
gets newer growths the plant will seem to grow away from the problem, that’s
why the younger leaves may be unaffected. On the top of the leaves, brown spots
can appear. While the severe areas of the leaves turn brown and wither.
Parts Affected by a Manganese deficiency are: Young leaves.
Too much Manganese in the soil will cause an iron deficiency. The blotchy leaf
tissue is caused by not enough chlorophyll synthesis. Your plants will seem to
have very weak vigor caused by the excessive amount of manganese.
Problems with Manganese being locked out by PH troubles
Soil ph of over 6.5, High iron soils, Low nitrogen Soils, Dry weather
and compacted soil.
Soil
Manganese gets locked out of soil growing at ph levels of 2.0-5.0
Manganese is absorbed best in soil at a ph level of 5.5-6.5 (Wouldn’t recommend
having a soil ph of over 7.0 in soil) anything out of the ranges listed will
contribute to a Manganese Deficiency.
Hydro and Soil less Mediums
Manganese gets locked out of Hydro and Soil less Mediums at ph levels of 2.0-4.5
Manganese is absorbed best in Hydro and Soil less Mediums at ph levels of 5.0-5.6
(Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range
for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed
will contribute to a manganese deficiency.
Solution to fixing a Manganese deficiency
Foliar feed with any chemical fertilizer containing Mn., or mix with water and water
your plants with it. Any Chemical/Organic nutrients that have Manganese in them will
fix a Manganese deficiency. (Only mixing at ½ strength when using chemical nutrients
or it will cause nutrient burn!) Other nutrients that have Manganese in them are:
Manganese chelate, Manganese carbonate, Manganese chloride, Manganese dioxide,
Manganese oxide, Manganese sulfate, which are all fast absorption. Garden Manure,
Greenssand are both good sources of manganese and are medium/ slow absorption.
Now if you added to much chemical nutrients and or organics,( which is hard to burn
your plants when using organics) You need to Flush the soil with plain water. You need
to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon
pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good
enough to get rid of excessive nutrients.
WROTE BY
STITCH
POSTED BY
GARRIGAN65
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My pH was 6.6 this morning.
Ok, good, then go ahead and add Epsom salt about a teaspoon per gallon should do it.
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Their next feed, they are due for a feed, can I just add it into that?
You can do it that way, but you don’t have to wait for a feeding, just add it to a watering of you want to.
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