Answer: Toothache plant is a name used for possibly more than one type of spilanthes, as well being commonly used for a number of other unrelated plants based on their "herbal" uses. Spilanthes acmella and related Spilanthes oleracea are traditional herbal remedy plants (anesthetic) for teeth and gum pain and may have some antiseptic value. Spilanthes originates in the tropics where it is perennial and is grown as an annual in cold winter areas so it is considered for to be a "tender perennial". To grow it as an annual, provide sun to part shade and an evenly moist but well drained soil and protect it from frost. Enjoy your plant!
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