Magickal Form: Woven, Cotton balls
In southern lore, if you shape a piece of cotton into the initial of the one you love and lost, and hold it in your lap, this person will return to you.
Cotton brings good luck and it is the best material to use to create an ouanga bag to hold roots and talismans for magick spells. Burn a piece of cotton or soak it in camphor oil when you need rain.
For a simple banishing spell, soak a cotton ball in banishing oil, then slip it into your target's pocket.
In Pennsylvania folklore, it is said that if any one suffering from corns takes a small piece of cotton, rubs it over the offenders and hides it, unobserved, with a body about to be buried, the corns will leave him.
From: The Encyclopedia of Magickal Ingredients and other sources.