20 Frugal Uses for Epsom Salt. I can't say enough good things about using an Epsom salt solution on all your plants (the cheap stuff from the drug store is fine, just don't buy the scented type). Here's more things to do with Epsom salts.
epsom salts in 4 c warm water.spray on plant and then 10 days later it produces more fruit due to boost of magnesium. especially for tomatoes, peppers and roses.green bell pepper plants - Gardening In Your Yard
Garden Variety: The trouble with peppers - Mid-Atlantic gardening: Tips and pictures on flowers, vegetables, public gardens, composting and farmers’ markets - baltimoresun.com
spray the plant with epsom salts 1 teaspoon dissolved in a spray bottle of warm water (about 4 cups). that gives the pepper plant a boost of magnesium that is required at flowering time to produce fruit. spray them again 10 days later.