We are not in tune to going to the garden center for Epsom salts. The American gardener is used to going to the pharmacy or the grocery store for Epsom salts. But things may change.
Epsom salts make a very good fertilizer. This mineral nurtures plants with sulfur and magnesium. It has been suggested for the past few decades to try this salt. Many people have experienced good results.
Use Epsom salt in the spring.
How to use depends on what you are going to do with it. If you are going to mix it in your potting soil and have a wheelbarrow full 1 1/2 cups should be plenty. If you are using it to plant bulbs a couple of teaspoons per bulb is plenty.
Using too much is not going to harm any living thing, for this leaches rather quickly as it does it job.
I use it for potted plants as it tends to help the roots and maybe green things up a little.
I use about 1/2 cup per gallon of water.
This is a home remedy and should be treated as such. Maybe it will work and maybe it just will not do the job but I do like it and have never seen any adverse effects from it.
Europeans have known for a long time to frequently use this product. Since only 10% of US Epsom salts sales are in garden centers, maybe the trend will change.
Ref: Epso Grow Internet site - www.epsogrow.com