Combine the ½ cup Epsom salt and viola or pansy petals in the bowl of a mini food processor. Blend until the flowers are completely incorporated. Spread the now colored salt in a thin layer on a sheet of wax paper and allow to air dry for one to two days before proceeding with the recipe.
Crumble the dried floral salt and combine with the remaining ingredients.
You can leave the soak unscented or optionally add 4 drops of your favorite essential oil such as rose, geranium, clary sage, lavender, litsea, etc.
Store the soak in a tightly closed glass jar for three to four months, keeping in mind that the scent may fade over time.
To use, dump the soak into a bathtub while it fills with comfortably warm water. Alternatively, you can tie it up in a muslin tea bag or clean sock before adding to the tub.