: any of a genus (Petunia) of tropical South American herbs of the nightshade family that are commonly grown as annuals for their fragrant, colorful, trumpet-shaped flowers
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All petunia plantings need a moist but not wet soil.—Tom MacCubbin, The Orlando Sentinel, 11 Apr. 2026 Even a few containers of petunias on a balcony or a single bee balm plant in a sunny bed can make a difference.—Lauren Jarvis-Gibson, Fort Worth Star-Telegram, 10 Apr. 2026 Trailing geraniums, petunias, and chartreuse or purple sweet potato vines can be alternated around the sides of the pot.—ABC News, 7 Apr. 2026 Possibly the most popular summer annual, petunias can be found in every color of the rainbow, as well as striped and speckled.—Brandee Gruener, Southern Living, 5 Apr. 2026 See All Example Sentences for petunia
Word History
Etymology
New Latin, from obsolete French petun tobacco, from Tupi petɨ́ma