Alfalfa tea is a natural and inexpensive fertilizer. Alfalfa pellets and meal are available from garden and feed supply stores in 50 lb. bags. Pellets are easier to handle, but I feel that the meal makes a better fertilizer.
Epsom salts are also available in bulk.
In our area, Buckerfield's, Borden Merchantile and Integrity stock them. If you don't have time to make alfalfa tea, you can still sprinke alfalfa pellets on the ground in the Spring - however the nutrients will take much longer to be released, it doesn't look as attractive, and the pellets can attract rodents. A better solution would be to use Complete Organic mix and add extra alfalfa meal to it, then scratch it into the surface of the soil. Orchid and rose growers use alfalfa tea as a foliar spray. If you grow delphiniums and irises, they also love alfalfa tea.