Epsom salt is a longtime, affordable way to help start your garden or improve your garden once it’s already going. You can use Epsom salt in the garden as a fertilizer, a pest deterrent, and also as a seed starter, to name a few. Epsom salt can also enhance the quality and condition of your lawn and shrubs! I've used this for years when planting tomatoes and it does a great job. Learned it from my Dad.