Facing trouble reviving the health of your plant? They refuse to respond to any fertilizer?
It could be a deficiency of magnesium and sulphur.
Epsom salt (magnesium sulphate) improves the plant ability to take up nutrients from the soil and you see a quick recovery in plant health which results in better flowering and fruiting.
If your plant has leaf curl it can be a deficiency of magnesium and Epsom salt will help in removing the deficiency.
Add a teaspoon directly to soil
or dissolve one teaspoon in 2 to 4 liter of water and spray it on plant leaves and stem.