Spilanthes (Spilanthes acmella)
Popularly used for an anti-viral, anti-fungal, immune enhancer which has a numbing effect in the mouth.
How to Grow Spilanthes from Seed
Spilanthes (toothache cress) is a frost sensitive annual that prefers full sun and soil rich in organic matter. Provide moderate to high moisture during growing season.
Start seed indoors 3-4 weeks before the last frost. Sow seeds 3-4" apart on the soil surface and press lightly to settle. Seeds germinate best when soil temps are 65-80°F. Seeds will sprout in14-30 days. Thin seedlings so that mature plants are 12-18″ apart. Transplant outdoors once the danger of frost has passed. For best results, provide plants with moderate to high amounts of water.
Harvest above ground parts while plants are flowering (mid-late summer). Toothache cress is used fresh in tinctures, syrups, salves, etc.