greenland
Well-Known Member
yep, when you ask me it looks like a mg deficiency.
causes could be:
Too wet, cold and/or too sour root environment.
High content at potassium, ammonium and/or calcium.
Too small root system and heavy plant load.
High EC in the medium,braked evaporate
solution:
Check the temperature, damp, EC and the PH of your medium.
If it's a mg deficiency you can best sprayers (leaf feeding) with 2% solution bitters salt.
By a low PH temporarily a higher PH of the water arrest.By a too high EC rinse and/or drip temporarily tap water only.
to make sure its a mg deficiency,spray with 2% solution bitters salt on the leaves that are affected.Before you trow some manure on the soil.
You will see recovery in a few day's (4 a 5 days)
causes could be:
Too wet, cold and/or too sour root environment.
High content at potassium, ammonium and/or calcium.
Too small root system and heavy plant load.
High EC in the medium,braked evaporate
solution:
Check the temperature, damp, EC and the PH of your medium.
If it's a mg deficiency you can best sprayers (leaf feeding) with 2% solution bitters salt.
By a low PH temporarily a higher PH of the water arrest.By a too high EC rinse and/or drip temporarily tap water only.
to make sure its a mg deficiency,spray with 2% solution bitters salt on the leaves that are affected.Before you trow some manure on the soil.
You will see recovery in a few day's (4 a 5 days)
doesn't seem to work out 
but your right its what babygrow said epsom salt, we call it bitter salt or epsom salt.
